diff --git a/data/librispeech/librispeech.py b/data/librispeech/librispeech.py
deleted file mode 100644
index ae1bae2defee069b0a228c08deebeb9d54548c67..0000000000000000000000000000000000000000
--- a/data/librispeech/librispeech.py
+++ /dev/null
@@ -1,159 +0,0 @@
-# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Prepare Librispeech ASR datasets.
-
-Download, unpack and create manifest files.
-Manifest file is a json-format file with each line containing the
-meta data (i.e. audio filepath, transcript and audio duration)
-of each audio file in the data set.
-"""
-
-import distutils.util
-import os
-import sys
-import argparse
-import soundfile
-import json
-import codecs
-import io
-from data_utils.utility import download, unpack
-
-URL_ROOT = "http://www.openslr.org/resources/12"
-URL_ROOT = "https://openslr.magicdatatech.com/resources/12"
-URL_TEST_CLEAN = URL_ROOT + "/test-clean.tar.gz"
-URL_TEST_OTHER = URL_ROOT + "/test-other.tar.gz"
-URL_DEV_CLEAN = URL_ROOT + "/dev-clean.tar.gz"
-URL_DEV_OTHER = URL_ROOT + "/dev-other.tar.gz"
-URL_TRAIN_CLEAN_100 = URL_ROOT + "/train-clean-100.tar.gz"
-URL_TRAIN_CLEAN_360 = URL_ROOT + "/train-clean-360.tar.gz"
-URL_TRAIN_OTHER_500 = URL_ROOT + "/train-other-500.tar.gz"
-
-MD5_TEST_CLEAN = "32fa31d27d2e1cad72775fee3f4849a9"
-MD5_TEST_OTHER = "fb5a50374b501bb3bac4815ee91d3135"
-MD5_DEV_CLEAN = "42e2234ba48799c1f50f24a7926300a1"
-MD5_DEV_OTHER = "c8d0bcc9cca99d4f8b62fcc847357931"
-MD5_TRAIN_CLEAN_100 = "2a93770f6d5c6c964bc36631d331a522"
-MD5_TRAIN_CLEAN_360 = "c0e676e450a7ff2f54aeade5171606fa"
-MD5_TRAIN_OTHER_500 = "d1a0fd59409feb2c614ce4d30c387708"
-
-parser = argparse.ArgumentParser(description=__doc__)
-parser.add_argument(
-    "--target_dir",
-    default='~/.cache/paddle/dataset/speech/libri',
-    type=str,
-    help="Directory to save the dataset. (default: %(default)s)")
-parser.add_argument(
-    "--manifest_prefix",
-    default="manifest",
-    type=str,
-    help="Filepath prefix for output manifests. (default: %(default)s)")
-parser.add_argument(
-    "--full_download",
-    default="True",
-    type=distutils.util.strtobool,
-    help="Download all datasets for Librispeech."
-    " If False, only download a minimal requirement (test-clean, dev-clean"
-    " train-clean-100). (default: %(default)s)")
-args = parser.parse_args()
-
-
-def create_manifest(data_dir, manifest_path):
-    """Create a manifest json file summarizing the data set, with each line
-    containing the meta data (i.e. audio filepath, transcription text, audio
-    duration) of each audio file within the data set.
-    """
-    print("Creating manifest %s ..." % manifest_path)
-    json_lines = []
-    for subfolder, _, filelist in sorted(os.walk(data_dir)):
-        text_filelist = [
-            filename for filename in filelist if filename.endswith('trans.txt')
-        ]
-        if len(text_filelist) > 0:
-            text_filepath = os.path.join(subfolder, text_filelist[0])
-            for line in io.open(text_filepath, encoding="utf8"):
-                segments = line.strip().split()
-                text = ' '.join(segments[1:]).lower()
-                audio_filepath = os.path.join(subfolder, segments[0] + '.flac')
-                audio_data, samplerate = soundfile.read(audio_filepath)
-                duration = float(len(audio_data)) / samplerate
-                json_lines.append(
-                    json.dumps({
-                        'audio_filepath': audio_filepath,
-                        'duration': duration,
-                        'text': text
-                    }))
-    with codecs.open(manifest_path, 'w', 'utf-8') as out_file:
-        for line in json_lines:
-            out_file.write(line + '\n')
-
-
-def prepare_dataset(url, md5sum, target_dir, manifest_path):
-    """Download, unpack and create summmary manifest file.
-    """
-    if not os.path.exists(os.path.join(target_dir, "LibriSpeech")):
-        # download
-        filepath = download(url, md5sum, target_dir)
-        # unpack
-        unpack(filepath, target_dir)
-    else:
-        print("Skip downloading and unpacking. Data already exists in %s." %
-              target_dir)
-    # create manifest json file
-    create_manifest(target_dir, manifest_path)
-
-
-def main():
-    if args.target_dir.startswith('~'):
-        args.target_dir = os.path.expanduser(args.target_dir)
-
-    prepare_dataset(
-        url=URL_TEST_CLEAN,
-        md5sum=MD5_TEST_CLEAN,
-        target_dir=os.path.join(args.target_dir, "test-clean"),
-        manifest_path=args.manifest_prefix + ".test-clean")
-    prepare_dataset(
-        url=URL_DEV_CLEAN,
-        md5sum=MD5_DEV_CLEAN,
-        target_dir=os.path.join(args.target_dir, "dev-clean"),
-        manifest_path=args.manifest_prefix + ".dev-clean")
-    if args.full_download:
-        prepare_dataset(
-            url=URL_TRAIN_CLEAN_100,
-            md5sum=MD5_TRAIN_CLEAN_100,
-            target_dir=os.path.join(args.target_dir, "train-clean-100"),
-            manifest_path=args.manifest_prefix + ".train-clean-100")
-        prepare_dataset(
-            url=URL_TEST_OTHER,
-            md5sum=MD5_TEST_OTHER,
-            target_dir=os.path.join(args.target_dir, "test-other"),
-            manifest_path=args.manifest_prefix + ".test-other")
-        prepare_dataset(
-            url=URL_DEV_OTHER,
-            md5sum=MD5_DEV_OTHER,
-            target_dir=os.path.join(args.target_dir, "dev-other"),
-            manifest_path=args.manifest_prefix + ".dev-other")
-        prepare_dataset(
-            url=URL_TRAIN_CLEAN_360,
-            md5sum=MD5_TRAIN_CLEAN_360,
-            target_dir=os.path.join(args.target_dir, "train-clean-360"),
-            manifest_path=args.manifest_prefix + ".train-clean-360")
-        prepare_dataset(
-            url=URL_TRAIN_OTHER_500,
-            md5sum=MD5_TRAIN_OTHER_500,
-            target_dir=os.path.join(args.target_dir, "train-other-500"),
-            manifest_path=args.manifest_prefix + ".train-other-500")
-
-
-if __name__ == '__main__':
-    main()
diff --git a/data/aishell/aishell.py b/examples/aishell/local/aishell.py
similarity index 100%
rename from data/aishell/aishell.py
rename to examples/aishell/local/aishell.py
diff --git a/examples/aishell/run_data.sh b/examples/aishell/local/run_data.sh
similarity index 50%
rename from examples/aishell/run_data.sh
rename to examples/aishell/local/run_data.sh
index fc002fcd2884de64e8aa7c06f0214afe44f9193b..c4fa11c4cbeef49e37f9c97c543f63948b0d89ca 100644
--- a/examples/aishell/run_data.sh
+++ b/examples/aishell/local/run_data.sh
@@ -1,11 +1,9 @@
 #! /usr/bin/env bash
 
-cd ../.. > /dev/null
-
 # download data, generate manifests
-PYTHONPATH=.:$PYTHONPATH python3 data/aishell/aishell.py \
---manifest_prefix='data/aishell/manifest' \
---target_dir='./dataset/aishell'
+PYTHONPATH=.:$PYTHONPATH python3 local/aishell.py \
+--manifest_prefix="data/manifest" \
+--target_dir="./dataset/aishell"
 
 if [ $? -ne 0 ]; then
     echo "Prepare Aishell failed. Terminated."
@@ -14,10 +12,10 @@ fi
 
 
 # build vocabulary
-python3 tools/build_vocab.py \
+python3 ${MAIN_ROOT}/tools/build_vocab.py \
 --count_threshold=0 \
---vocab_path='data/aishell/vocab.txt' \
---manifest_paths 'data/aishell/manifest.train' 'data/aishell/manifest.dev'
+--vocab_path="data/vocab.txt" \
+--manifest_paths "data/manifest.train" "data/manifest.dev"
 
 if [ $? -ne 0 ]; then
     echo "Build vocabulary failed. Terminated."
@@ -26,11 +24,11 @@ fi
 
 
 # compute mean and stddev for normalizer
-python3 tools/compute_mean_std.py \
---manifest_path='data/aishell/manifest.train' \
+python3 ${MAIN_ROOT}/tools/compute_mean_std.py \
+--manifest_path="data/manifest.train" \
 --num_samples=2000 \
---specgram_type='linear' \
---output_path='data/aishell/mean_std.npz'
+--specgram_type="linear" \
+--output_path="data/mean_std.npz"
 
 if [ $? -ne 0 ]; then
     echo "Compute mean and stddev failed. Terminated."
diff --git a/examples/aishell/run_infer.sh b/examples/aishell/local/run_infer.sh
similarity index 62%
rename from examples/aishell/run_infer.sh
rename to examples/aishell/local/run_infer.sh
index ef382e310ebe0dba8317585c755444c834022bcd..7a0d796910aa95d5f184c8189629ce0988802e47 100644
--- a/examples/aishell/run_infer.sh
+++ b/examples/aishell/local/run_infer.sh
@@ -27,14 +27,14 @@ python3 -u infer.py \
 --use_gru=True \
 --use_gpu=True \
 --share_rnn_weights=False \
---infer_manifest='data/aishell/manifest.test' \
---mean_std_path='data/aishell/mean_std.npz' \
---vocab_path='data/aishell/vocab.txt' \
---model_path='checkpoints/aishell/step_final' \
---lang_model_path='models/lm/zh_giga.no_cna_cmn.prune01244.klm' \
---decoding_method='ctc_beam_search' \
---error_rate_type='cer' \
---specgram_type='linear'
+--infer_manifest="data/aishell/manifest.test" \
+--mean_std_path="data/aishell/mean_std.npz" \
+--vocab_path="data/aishell/vocab.txt" \
+--model_path="checkpoints/aishell/step_final" \
+--lang_model_path="models/lm/zh_giga.no_cna_cmn.prune01244.klm" \
+--decoding_method="ctc_beam_search" \
+--error_rate_type="cer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in inference!"
diff --git a/examples/aishell/run_infer_golden.sh b/examples/aishell/local/run_infer_golden.sh
similarity index 68%
rename from examples/aishell/run_infer_golden.sh
rename to examples/aishell/local/run_infer_golden.sh
index dabdc0c68f5a295d5d0517a51de5c26889431511..7e0ede661628412223866986b7bf81e34b897a21 100644
--- a/examples/aishell/run_infer_golden.sh
+++ b/examples/aishell/local/run_infer_golden.sh
@@ -36,14 +36,14 @@ python3 -u infer.py \
 --use_gru=True \
 --use_gpu=False \
 --share_rnn_weights=False \
---infer_manifest='data/aishell/manifest.test' \
---mean_std_path='models/aishell/mean_std.npz' \
---vocab_path='models/aishell/vocab.txt' \
---model_path='models/aishell' \
---lang_model_path='models/lm/zh_giga.no_cna_cmn.prune01244.klm' \
---decoding_method='ctc_beam_search' \
---error_rate_type='cer' \
---specgram_type='linear'
+--infer_manifest="data/aishell/manifest.test" \
+--mean_std_path="models/aishell/mean_std.npz" \
+--vocab_path="models/aishell/vocab.txt" \
+--model_path="models/aishell" \
+--lang_model_path="models/lm/zh_giga.no_cna_cmn.prune01244.klm" \
+--decoding_method="ctc_beam_search" \
+--error_rate_type="cer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in inference!"
diff --git a/examples/aishell/run_test.sh b/examples/aishell/local/run_test.sh
similarity index 63%
rename from examples/aishell/run_test.sh
rename to examples/aishell/local/run_test.sh
index b56d164b99cabd8fe319d1456b0e6b106e9feef7..31be69feb5ef4ab5c070f2061f8e2cf31dc2a5e6 100644
--- a/examples/aishell/run_test.sh
+++ b/examples/aishell/local/run_test.sh
@@ -27,14 +27,14 @@ python3 -u test.py \
 --use_gru=True \
 --use_gpu=True \
 --share_rnn_weights=False \
---test_manifest='data/aishell/manifest.test' \
---mean_std_path='data/aishell/mean_std.npz' \
---vocab_path='data/aishell/vocab.txt' \
---model_path='checkpoints/aishell/step_final' \
---lang_model_path='models/lm/zh_giga.no_cna_cmn.prune01244.klm' \
---decoding_method='ctc_beam_search' \
---error_rate_type='cer' \
---specgram_type='linear'
+--test_manifest="data/aishell/manifest.test" \
+--mean_std_path="data/aishell/mean_std.npz" \
+--vocab_path="data/aishell/vocab.txt" \
+--model_path="checkpoints/aishell/step_final" \
+--lang_model_path="models/lm/zh_giga.no_cna_cmn.prune01244.klm" \
+--decoding_method="ctc_beam_search" \
+--error_rate_type="cer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in evaluation!"
diff --git a/examples/aishell/run_test_golden.sh b/examples/aishell/local/run_test_golden.sh
similarity index 69%
rename from examples/aishell/run_test_golden.sh
rename to examples/aishell/local/run_test_golden.sh
index 2f79cc64797231c04899b9c726af53eab8f1c246..ea423c0481890a1424b2106d46818a9ae0a0abfb 100644
--- a/examples/aishell/run_test_golden.sh
+++ b/examples/aishell/local/run_test_golden.sh
@@ -36,14 +36,14 @@ python3 -u test.py \
 --use_gru=True \
 --use_gpu=True \
 --share_rnn_weights=False \
---test_manifest='data/aishell/manifest.test' \
---mean_std_path='models/aishell/mean_std.npz' \
---vocab_path='models/aishell/vocab.txt' \
---model_path='models/aishell' \
---lang_model_path='models/lm/zh_giga.no_cna_cmn.prune01244.klm' \
---decoding_method='ctc_beam_search' \
---error_rate_type='cer' \
---specgram_type='linear'
+--test_manifest="data/aishell/manifest.test" \
+--mean_std_path="models/aishell/mean_std.npz" \
+--vocab_path="models/aishell/vocab.txt" \
+--model_path="models/aishell" \
+--lang_model_path="models/lm/zh_giga.no_cna_cmn.prune01244.klm" \
+--decoding_method="ctc_beam_search" \
+--error_rate_type="cer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in evaluation!"
diff --git a/examples/aishell/run_train.sh b/examples/aishell/local/run_train.sh
similarity index 66%
rename from examples/aishell/run_train.sh
rename to examples/aishell/local/run_train.sh
index 889e1904735a88b8b2a63c2160da54eff9ae5bbe..6faed6c6202fdc72eaca69b434ae0678ad0a53dc 100644
--- a/examples/aishell/run_train.sh
+++ b/examples/aishell/local/run_train.sh
@@ -24,14 +24,14 @@ python3 -u train.py \
 --use_gpu=True \
 --is_local=True \
 --share_rnn_weights=False \
---train_manifest='data/aishell/manifest.train' \
---dev_manifest='data/aishell/manifest.dev' \
---mean_std_path='data/aishell/mean_std.npz' \
---vocab_path='data/aishell/vocab.txt' \
---output_model_dir='./checkpoints/aishell' \
---augment_conf_path='conf/augmentation.config' \
---specgram_type='linear' \
---shuffle_method='batch_shuffle_clipped' \
+--train_manifest="data/aishell/manifest.train" \
+--dev_manifest="data/aishell/manifest.dev" \
+--mean_std_path="data/aishell/mean_std.npz" \
+--vocab_path="data/aishell/vocab.txt" \
+--output_model_dir="./checkpoints/aishell" \
+--augment_conf_path="conf/augmentation.config" \
+--specgram_type="linear" \
+--shuffle_method="batch_shuffle_clipped" \
 
 if [ $? -ne 0 ]; then
     echo "Failed in training!"
diff --git a/examples/aishell/path.sh b/examples/aishell/path.sh
new file mode 100644
index 0000000000000000000000000000000000000000..fd1cebba8ea9313ca30ee8bece2f6ddb0f29112d
--- /dev/null
+++ b/examples/aishell/path.sh
@@ -0,0 +1,8 @@
+export MAIN_ROOT=${PWD}/../../
+
+export PATH=${MAIN_ROOT}:${PWD}/tools:${PATH}
+export LC_ALL=C
+
+# Use UTF-8 in Python to avoid UnicodeDecodeError when LC_ALL=C
+export PYTHONIOENCODING=UTF-8 
+export PYTHONPATH=${MAIN_ROOT}:${PYTHONPATH}
diff --git a/examples/aishell/run.sh b/examples/aishell/run.sh
new file mode 100644
index 0000000000000000000000000000000000000000..c8e58913900677679a40210c1f2dae658c435db6
--- /dev/null
+++ b/examples/aishell/run.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+source path.sh
+
+# prepare data
+bash ./local/run_data.sh
+
+# test pretrain model
+bash ./local/run_test_golden.sh
+
+# test pretain model
+bash ./local/run_infer_golden.sh
+
+# train model
+bash ./local/run_train.sh
+
+# test model
+bash ./local/run_test.sh
+
+# infer model
+bash ./local/run_infer.sh
+
+# tune model
+bash ./local/run_tune.sh
diff --git a/examples/baidu_en8k/path.sh b/examples/baidu_en8k/path.sh
new file mode 100644
index 0000000000000000000000000000000000000000..fd1cebba8ea9313ca30ee8bece2f6ddb0f29112d
--- /dev/null
+++ b/examples/baidu_en8k/path.sh
@@ -0,0 +1,8 @@
+export MAIN_ROOT=${PWD}/../../
+
+export PATH=${MAIN_ROOT}:${PWD}/tools:${PATH}
+export LC_ALL=C
+
+# Use UTF-8 in Python to avoid UnicodeDecodeError when LC_ALL=C
+export PYTHONIOENCODING=UTF-8 
+export PYTHONPATH=${MAIN_ROOT}:${PYTHONPATH}
diff --git a/examples/baidu_en8k/run_infer_golden.sh b/examples/baidu_en8k/run_infer_golden.sh
index 85fea5f479cebd01a9cc615ab059738f953acbcc..11d7541eec9e309fe999a8c9956c6176015ae2b0 100644
--- a/examples/baidu_en8k/run_infer_golden.sh
+++ b/examples/baidu_en8k/run_infer_golden.sh
@@ -1,9 +1,9 @@
 #! /usr/bin/env bash
 
-cd ../.. > /dev/null
+source path.sh
 
 # download language model
-cd models/lm > /dev/null
+cd ${MAIN_ROOT}/models/lm > /dev/null
 bash download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
@@ -12,7 +12,7 @@ cd - > /dev/null
 
 
 # download well-trained model
-cd models/baidu_en8k > /dev/null
+cd ${MAIN_ROOT}/models/baidu_en8k > /dev/null
 bash download_model.sh
 if [ $? -ne 0 ]; then
     exit 1
@@ -22,7 +22,7 @@ cd - > /dev/null
 
 # infer
 CUDA_VISIBLE_DEVICES=0 \
-python3 -u infer.py \
+python3 -u ${MAIN_ROOT}/infer.py \
 --num_samples=10 \
 --beam_size=500 \
 --num_proc_bsearch=5 \
@@ -36,14 +36,14 @@ python3 -u infer.py \
 --use_gru=True \
 --use_gpu=False \
 --share_rnn_weights=False \
---infer_manifest='data/librispeech/manifest.test-clean' \
---mean_std_path='models/baidu_en8k/mean_std.npz' \
---vocab_path='models/baidu_en8k/vocab.txt' \
---model_path='models/baidu_en8k' \
---lang_model_path='models/lm/common_crawl_00.prune01111.trie.klm' \
---decoding_method='ctc_beam_search' \
---error_rate_type='wer' \
---specgram_type='linear'
+--infer_manifest="${MAIN_ROOT}/examples/librispeech/data/manifest.test-clean" \
+--mean_std_path="${MAIN_ROOT}/models/baidu_en8k/mean_std.npz" \
+--vocab_path="${MAIN_ROOT}/models/baidu_en8k/vocab.txt" \
+--model_path="${MAIN_ROOT}/models/baidu_en8k" \
+--lang_model_path="${MAIN_ROOT}/models/lm/common_crawl_00.prune01111.trie.klm" \
+--decoding_method="ctc_beam_search" \
+--error_rate_type="wer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in inference!"
diff --git a/examples/baidu_en8k/run_test_golden.sh b/examples/baidu_en8k/run_test_golden.sh
index 1ed63362477e9746665b0beb547ef6ebad10c311..f77f934cc8e7ec1391f259eccc5b28064bd8e780 100644
--- a/examples/baidu_en8k/run_test_golden.sh
+++ b/examples/baidu_en8k/run_test_golden.sh
@@ -37,14 +37,14 @@ python3 -u test.py \
 --use_gru=True \
 --use_gpu=False \
 --share_rnn_weights=False \
---test_manifest='data/librispeech/manifest.test-clean' \
---mean_std_path='models/baidu_en8k/mean_std.npz' \
---vocab_path='models/baidu_en8k/vocab.txt' \
---model_path='models/baidu_en8k' \
---lang_model_path='models/lm/common_crawl_00.prune01111.trie.klm' \
---decoding_method='ctc_beam_search' \
---error_rate_type='wer' \
---specgram_type='linear'
+--test_manifest="data/librispeech/manifest.test-clean" \
+--mean_std_path="models/baidu_en8k/mean_std.npz" \
+--vocab_path="models/baidu_en8k/vocab.txt" \
+--model_path="models/baidu_en8k" \
+--lang_model_path="models/lm/common_crawl_00.prune01111.trie.klm" \
+--decoding_method="ctc_beam_search" \
+--error_rate_type="wer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in evaluation!"
diff --git a/examples/deploy_demo/path.sh b/examples/deploy_demo/path.sh
new file mode 100644
index 0000000000000000000000000000000000000000..fd1cebba8ea9313ca30ee8bece2f6ddb0f29112d
--- /dev/null
+++ b/examples/deploy_demo/path.sh
@@ -0,0 +1,8 @@
+export MAIN_ROOT=${PWD}/../../
+
+export PATH=${MAIN_ROOT}:${PWD}/tools:${PATH}
+export LC_ALL=C
+
+# Use UTF-8 in Python to avoid UnicodeDecodeError when LC_ALL=C
+export PYTHONIOENCODING=UTF-8 
+export PYTHONPATH=${MAIN_ROOT}:${PYTHONPATH}
diff --git a/examples/deploy_demo/run_demo_client.sh b/examples/deploy_demo/run_demo_client.sh
index 7c2609511afc5760865fcd49ab2d515b1b2cc5d3..60581c6615d078da237fc45cf8263b269c5d3b06 100644
--- a/examples/deploy_demo/run_demo_client.sh
+++ b/examples/deploy_demo/run_demo_client.sh
@@ -1,11 +1,11 @@
 #! /usr/bin/env bash
 
-cd ../.. > /dev/null
+source path.sh
 
 # start demo client
 CUDA_VISIBLE_DEVICES=0 \
-python3 -u deploy/demo_client.py \
---host_ip='localhost' \
+python3 -u ${MAIN_ROOT}/deploy/demo_client.py \
+--host_ip="localhost" \
 --host_port=8086 \
 
 if [ $? -ne 0 ]; then
diff --git a/examples/deploy_demo/run_english_demo_server.sh b/examples/deploy_demo/run_english_demo_server.sh
index 5d86ab6e10f6bb08b993ee1ef961c7985ff90057..ae092dbce81626e1228992603d303df5148111d0 100644
--- a/examples/deploy_demo/run_english_demo_server.sh
+++ b/examples/deploy_demo/run_english_demo_server.sh
@@ -1,10 +1,10 @@
 #! /usr/bin/env bash
 # TODO: replace the model with a mandarin model
 
-cd ../.. > /dev/null
+source path.sh
 
 # download language model
-cd models/lm > /dev/null
+cd ${MAIN_ROOT}/models/lm > /dev/null
 bash download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
@@ -13,7 +13,7 @@ cd - > /dev/null
 
 
 # download well-trained model
-cd models/baidu_en8k > /dev/null
+cd ${MAIN_ROOT}/models/baidu_en8k > /dev/null
 bash download_model.sh
 if [ $? -ne 0 ]; then
     exit 1
@@ -23,8 +23,8 @@ cd - > /dev/null
 
 # start demo server
 CUDA_VISIBLE_DEVICES=0 \
-python3 -u deploy/demo_server.py \
---host_ip='localhost' \
+python3 -u ${MAIN_ROOT}/deploy/demo_server.py \
+--host_ip="localhost" \
 --host_port=8086 \
 --num_conv_layers=2 \
 --num_rnn_layers=3 \
@@ -36,14 +36,14 @@ python3 -u deploy/demo_server.py \
 --use_gru=True \
 --use_gpu=True \
 --share_rnn_weights=False \
---speech_save_dir='demo_cache' \
---warmup_manifest='data/tiny/manifest.test-clean' \
---mean_std_path='models/baidu_en8k/mean_std.npz' \
---vocab_path='models/baidu_en8k/vocab.txt' \
---model_path='models/baidu_en8k' \
---lang_model_path='models/lm/common_crawl_00.prune01111.trie.klm' \
---decoding_method='ctc_beam_search' \
---specgram_type='linear'
+--speech_save_dir="demo_cache" \
+--warmup_manifest="${MAIN_ROOT}/examples/tiny/data/manifest.test-clean" \
+--mean_std_path="${MAIN_ROOT}/models/baidu_en8k/mean_std.npz" \
+--vocab_path="${MAIN_ROOT}/models/baidu_en8k/vocab.txt" \
+--model_path="${MAIN_ROOT}/models/baidu_en8k" \
+--lang_model_path="${MAIN_ROOT}/models/lm/common_crawl_00.prune01111.trie.klm" \
+--decoding_method="ctc_beam_search" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in starting demo server!"
diff --git a/examples/librispeech/local/run_data.sh b/examples/librispeech/local/run_data.sh
new file mode 100644
index 0000000000000000000000000000000000000000..1e8fd6a52e11b8cf23922c434f271161a0cb9d8c
--- /dev/null
+++ b/examples/librispeech/local/run_data.sh
@@ -0,0 +1,43 @@
+#! /usr/bin/env bash
+
+# download data, generate manifests
+PYTHONPATH=.:$PYTHONPATH python3 local/librispeech.py \
+--manifest_prefix="data/manifest" \
+--target_dir="./dataset/librispeech" \
+--full_download="True"
+
+if [ $? -ne 0 ]; then
+    echo "Prepare LibriSpeech failed. Terminated."
+    exit 1
+fi
+
+cat data/manifest.train-* | shuf > data/manifest.train
+
+
+# build vocabulary
+python3 ${MAIN_ROOT}/tools/build_vocab.py \
+--count_threshold=0 \
+--vocab_path="data/vocab.txt" \
+--manifest_paths="data/manifest.train"
+
+if [ $? -ne 0 ]; then
+    echo "Build vocabulary failed. Terminated."
+    exit 1
+fi
+
+
+# compute mean and stddev for normalizer
+python3 ${MAIN_ROOT}/tools/compute_mean_std.py \
+--manifest_path="data/manifest.train" \
+--num_samples=2000 \
+--specgram_type="linear" \
+--output_path="data/mean_std.npz"
+
+if [ $? -ne 0 ]; then
+    echo "Compute mean and stddev failed. Terminated."
+    exit 1
+fi
+
+
+echo "LibriSpeech Data preparation done."
+exit 0
diff --git a/examples/librispeech/run_infer.sh b/examples/librispeech/local/run_infer.sh
similarity index 53%
rename from examples/librispeech/run_infer.sh
rename to examples/librispeech/local/run_infer.sh
index 2452b45e3da7460ddce9477afa9e01e3bc974172..33959b38107e9f2e49ee1288c82204d2b2dfef0b 100644
--- a/examples/librispeech/run_infer.sh
+++ b/examples/librispeech/local/run_infer.sh
@@ -1,9 +1,7 @@
 #! /usr/bin/env bash
 
-cd ../.. > /dev/null
-
 # download language model
-cd models/lm > /dev/null
+cd ${MAIN_ROOT}/models/lm > /dev/null
 bash download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
@@ -13,7 +11,7 @@ cd - > /dev/null
 
 # infer
 CUDA_VISIBLE_DEVICES=0 \
-python3 -u infer.py \
+python3 -u ${MAIN_ROOT}/infer.py \
 --num_samples=10 \
 --beam_size=500 \
 --num_proc_bsearch=8 \
@@ -27,14 +25,14 @@ python3 -u infer.py \
 --use_gru=False \
 --use_gpu=True \
 --share_rnn_weights=True \
---infer_manifest='data/librispeech/manifest.test-clean' \
---mean_std_path='data/librispeech/mean_std.npz' \
---vocab_path='data/librispeech/vocab.txt' \
---model_path='checkpoints/libri/step_final' \
---lang_model_path='models/lm/common_crawl_00.prune01111.trie.klm' \
---decoding_method='ctc_beam_search' \
---error_rate_type='wer' \
---specgram_type='linear'
+--infer_manifest="data/manifest.test-clean" \
+--mean_std_path="data/mean_std.npz" \
+--vocab_path="data/vocab.txt" \
+--model_path="checkpoints/step_final" \
+--lang_model_path="${MAIN_ROOT}/models/lm/common_crawl_00.prune01111.trie.klm" \
+--decoding_method="ctc_beam_search" \
+--error_rate_type="wer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in inference!"
diff --git a/examples/librispeech/run_infer_golden.sh b/examples/librispeech/local/run_infer_golden.sh
similarity index 54%
rename from examples/librispeech/run_infer_golden.sh
rename to examples/librispeech/local/run_infer_golden.sh
index 6004c6af6d8c3911487f3c9c2fefa11c04c73b14..21663681ba1813c797aedac24bb9a7eb74f0d0c2 100644
--- a/examples/librispeech/run_infer_golden.sh
+++ b/examples/librispeech/local/run_infer_golden.sh
@@ -1,9 +1,7 @@
 #! /usr/bin/env bash
 
-cd ../.. > /dev/null
-
 # download language model
-cd models/lm > /dev/null
+cd ${MAIN_ROOT}/models/lm > /dev/null
 bash download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
@@ -12,7 +10,7 @@ cd - > /dev/null
 
 
 # download well-trained model
-cd models/librispeech > /dev/null
+cd ${MAIN_ROOT}/models/librispeech > /dev/null
 bash download_model.sh
 if [ $? -ne 0 ]; then
     exit 1
@@ -22,7 +20,7 @@ cd - > /dev/null
 
 # infer
 CUDA_VISIBLE_DEVICES=0 \
-python3 -u infer.py \
+python3 -u ${MAIN_ROOT}/infer.py \
 --num_samples=10 \
 --beam_size=500 \
 --num_proc_bsearch=8 \
@@ -36,14 +34,14 @@ python3 -u infer.py \
 --use_gru=False \
 --use_gpu=True \
 --share_rnn_weights=True \
---infer_manifest='data/librispeech/manifest.test-clean' \
---mean_std_path='models/librispeech/mean_std.npz' \
---vocab_path='models/librispeech/vocab.txt' \
---model_path='models/librispeech' \
---lang_model_path='models/lm/common_crawl_00.prune01111.trie.klm' \
---decoding_method='ctc_beam_search' \
---error_rate_type='wer' \
---specgram_type='linear'
+--infer_manifest="data/manifest.test-clean" \
+--mean_std_path="${MAIN_ROOT}/models/librispeech/mean_std.npz" \
+--vocab_path="${MAIN_ROOT}/models/librispeech/vocab.txt" \
+--model_path="${MAIN_ROOT}/models/librispeech" \
+--lang_model_path="${MAIN_ROOT}/models/lm/common_crawl_00.prune01111.trie.klm" \
+--decoding_method="ctc_beam_search" \
+--error_rate_type="wer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in inference!"
diff --git a/examples/librispeech/run_test.sh b/examples/librispeech/local/run_test.sh
similarity index 55%
rename from examples/librispeech/run_test.sh
rename to examples/librispeech/local/run_test.sh
index e8e65c39ed1730ca029d3a7b56009f179fc9a669..cd8c07542d387c9ff04a568dec2c24f11355a369 100644
--- a/examples/librispeech/run_test.sh
+++ b/examples/librispeech/local/run_test.sh
@@ -1,9 +1,7 @@
 #! /usr/bin/env bash
 
-cd ../.. > /dev/null
-
 # download language model
-cd models/lm > /dev/null
+cd ${MAIN_ROOT}/models/lm > /dev/null
 bash download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
@@ -13,7 +11,7 @@ cd - > /dev/null
 
 # evaluate model
 CUDA_VISIBLE_DEVICES=0,1,2,3,4,5,6,7 \
-python3 -u test.py \
+python3 -u ${MAIN_ROOT}/test.py \
 --batch_size=128 \
 --beam_size=500 \
 --num_proc_bsearch=8 \
@@ -27,14 +25,14 @@ python3 -u test.py \
 --use_gru=False \
 --use_gpu=True \
 --share_rnn_weights=True \
---test_manifest='data/librispeech/manifest.test-clean' \
---mean_std_path='data/librispeech/mean_std.npz' \
---vocab_path='data/librispeech/vocab.txt' \
---model_path='checkpoints/libri/step_final' \
---lang_model_path='models/lm/common_crawl_00.prune01111.trie.klm' \
---decoding_method='ctc_beam_search' \
---error_rate_type='wer' \
---specgram_type='linear'
+--test_manifest="data/manifest.test-clean" \
+--mean_std_path="data/mean_std.npz" \
+--vocab_path="data/vocab.txt" \
+--model_path="checkpoints/step_final" \
+--lang_model_path="${MAIN_ROOT}/models/lm/common_crawl_00.prune01111.trie.klm" \
+--decoding_method="ctc_beam_search" \
+--error_rate_type="wer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in evaluation!"
diff --git a/examples/librispeech/run_test_golden.sh b/examples/librispeech/local/run_test_golden.sh
similarity index 55%
rename from examples/librispeech/run_test_golden.sh
rename to examples/librispeech/local/run_test_golden.sh
index 1db36758a3e9546e68fb7c78e5b1c5d47183f792..54ec6ad03bc0c41f30703ae6d8bdab198d58b7fa 100644
--- a/examples/librispeech/run_test_golden.sh
+++ b/examples/librispeech/local/run_test_golden.sh
@@ -1,9 +1,7 @@
 #! /usr/bin/env bash
 
-cd ../.. > /dev/null
-
 # download language model
-cd models/lm > /dev/null
+cd ${MAIN_ROOT}/models/lm > /dev/null
 bash download_lm_en.sh
 if [ $? -ne 0 ]; then
     exit 1
@@ -12,7 +10,7 @@ cd - > /dev/null
 
 
 # download well-trained model
-cd models/librispeech > /dev/null
+cd ${MAIN_ROOT}/models/librispeech > /dev/null
 bash download_model.sh
 if [ $? -ne 0 ]; then
     exit 1
@@ -22,7 +20,7 @@ cd - > /dev/null
 
 # evaluate model
 CUDA_VISIBLE_DEVICES=0,1,2,3,4,5,6,7 \
-python3 -u test.py \
+python3 -u ${MAIN_ROOT}/test.py \
 --batch_size=128 \
 --beam_size=500 \
 --num_proc_bsearch=8 \
@@ -36,14 +34,14 @@ python3 -u test.py \
 --use_gru=False \
 --use_gpu=True \
 --share_rnn_weights=True \
---test_manifest='data/librispeech/manifest.test-clean' \
---mean_std_path='models/librispeech/mean_std.npz' \
---vocab_path='models/librispeech/vocab.txt' \
---model_path='models/librispeech' \
---lang_model_path='models/lm/common_crawl_00.prune01111.trie.klm' \
---decoding_method='ctc_beam_search' \
---error_rate_type='wer' \
---specgram_type='linear'
+--test_manifest="data/manifest.test-clean" \
+--mean_std_path="${MAIN_ROOT}/models/librispeech/mean_std.npz" \
+--vocab_path="${MAIN_ROOT}/models/librispeech/vocab.txt" \
+--model_path="${MAIN_ROOT}/models/librispeech" \
+--lang_model_path="${MAIN_ROOT}/models/lm/common_crawl_00.prune01111.trie.klm" \
+--decoding_method="ctc_beam_search" \
+--error_rate_type="wer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in evaluation!"
diff --git a/examples/librispeech/run_train.sh b/examples/librispeech/local/run_train.sh
similarity index 60%
rename from examples/librispeech/run_train.sh
rename to examples/librispeech/local/run_train.sh
index 6b8982d78ecdc7674191e7de2e5c6f9c82f9cf56..32aa2657b725ddae546f4a3c090a1d27399a61e5 100644
--- a/examples/librispeech/run_train.sh
+++ b/examples/librispeech/local/run_train.sh
@@ -1,13 +1,11 @@
 #! /usr/bin/env bash
 
-cd ../.. > /dev/null
-
 # train model
 # if you wish to resume from an exists model, uncomment --init_from_pretrained_model
 export FLAGS_sync_nccl_allreduce=0
 
 CUDA_VISIBLE_DEVICES=0,1,2,3,4,5,6,7 \
-python3 -u train.py \
+python3 -u ${MAIN_ROOT}/train.py \
 --batch_size=20 \
 --num_epoch=50 \
 --num_conv_layers=2 \
@@ -25,14 +23,14 @@ python3 -u train.py \
 --use_gpu=True \
 --is_local=True \
 --share_rnn_weights=True \
---train_manifest='data/librispeech/manifest.train' \
---dev_manifest='data/librispeech/manifest.dev-clean' \
---mean_std_path='data/librispeech/mean_std.npz' \
---vocab_path='data/librispeech/vocab.txt' \
---output_model_dir='./checkpoints/libri' \
---augment_conf_path='conf/augmentation.config' \
---specgram_type='linear' \
---shuffle_method='batch_shuffle_clipped' \
+--train_manifest="data/manifest.train" \
+--dev_manifest="data/manifest.dev-clean" \
+--mean_std_path="data/mean_std.npz" \
+--vocab_path="data/vocab.txt" \
+--output_model_dir="./checkpoints/libri" \
+--augment_conf_path="${MAIN_ROOT}/conf/augmentation.config" \
+--specgram_type="linear" \
+--shuffle_method="batch_shuffle_clipped" \
 
 if [ $? -ne 0 ]; then
     echo "Failed in training!"
diff --git a/examples/librispeech/run_tune.sh b/examples/librispeech/local/run_tune.sh
similarity index 63%
rename from examples/librispeech/run_tune.sh
rename to examples/librispeech/local/run_tune.sh
index 834f060fa4ef175ca7482d96da60ab31fe308a56..80390c3599003b12112b0b9870550a5076388316 100644
--- a/examples/librispeech/run_tune.sh
+++ b/examples/librispeech/local/run_tune.sh
@@ -1,7 +1,5 @@
 #! /usr/bin/env bash
 
-cd ../.. > /dev/null
-
 # grid-search for hyper-parameters in language model
 CUDA_VISIBLE_DEVICES=0,1,2,3 \
 python3 -u tools/tune.py \
@@ -23,13 +21,13 @@ python3 -u tools/tune.py \
 --use_gru=False \
 --use_gpu=True \
 --share_rnn_weights=True \
---tune_manifest='data/librispeech/manifest.dev-clean' \
---mean_std_path='data/librispeech/mean_std.npz' \
---vocab_path='models/librispeech/vocab.txt' \
---model_path='models/librispeech' \
---lang_model_path='models/lm/common_crawl_00.prune01111.trie.klm' \
---error_rate_type='wer' \
---specgram_type='linear'
+--tune_manifest="data/manifest.dev-clean" \
+--mean_std_path="data/mean_std.npz" \
+--vocab_path="${MAIN_ROOT}/models/librispeech/vocab.txt" \
+--model_path="${MAIN_ROOT}/models/librispeech" \
+--lang_model_path="${MAIN_ROOT}/models/lm/common_crawl_00.prune01111.trie.klm" \
+--error_rate_type="wer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in tuning!"
diff --git a/examples/librispeech/path.sh b/examples/librispeech/path.sh
new file mode 100644
index 0000000000000000000000000000000000000000..fd1cebba8ea9313ca30ee8bece2f6ddb0f29112d
--- /dev/null
+++ b/examples/librispeech/path.sh
@@ -0,0 +1,8 @@
+export MAIN_ROOT=${PWD}/../../
+
+export PATH=${MAIN_ROOT}:${PWD}/tools:${PATH}
+export LC_ALL=C
+
+# Use UTF-8 in Python to avoid UnicodeDecodeError when LC_ALL=C
+export PYTHONIOENCODING=UTF-8 
+export PYTHONPATH=${MAIN_ROOT}:${PYTHONPATH}
diff --git a/examples/librispeech/run.sh b/examples/librispeech/run.sh
new file mode 100644
index 0000000000000000000000000000000000000000..c8e58913900677679a40210c1f2dae658c435db6
--- /dev/null
+++ b/examples/librispeech/run.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+source path.sh
+
+# prepare data
+bash ./local/run_data.sh
+
+# test pretrain model
+bash ./local/run_test_golden.sh
+
+# test pretain model
+bash ./local/run_infer_golden.sh
+
+# train model
+bash ./local/run_train.sh
+
+# test model
+bash ./local/run_test.sh
+
+# infer model
+bash ./local/run_infer.sh
+
+# tune model
+bash ./local/run_tune.sh
diff --git a/examples/librispeech/run_data.sh b/examples/librispeech/run_data.sh
deleted file mode 100644
index 788b415de41909c7f60e0b29e9002d860ad160e2..0000000000000000000000000000000000000000
--- a/examples/librispeech/run_data.sh
+++ /dev/null
@@ -1,45 +0,0 @@
-#! /usr/bin/env bash
-
-cd ../.. > /dev/null
-
-# download data, generate manifests
-PYTHONPATH=.:$PYTHONPATH python3 data/librispeech/librispeech.py \
---manifest_prefix='data/librispeech/manifest' \
---target_dir='./dataset/librispeech' \
---full_download='True'
-
-if [ $? -ne 0 ]; then
-    echo "Prepare LibriSpeech failed. Terminated."
-    exit 1
-fi
-
-cat data/librispeech/manifest.train-* | shuf > data/librispeech/manifest.train
-
-
-# build vocabulary
-python3 tools/build_vocab.py \
---count_threshold=0 \
---vocab_path='data/librispeech/vocab.txt' \
---manifest_paths='data/librispeech/manifest.train'
-
-if [ $? -ne 0 ]; then
-    echo "Build vocabulary failed. Terminated."
-    exit 1
-fi
-
-
-# compute mean and stddev for normalizer
-python3 tools/compute_mean_std.py \
---manifest_path='data/librispeech/manifest.train' \
---num_samples=2000 \
---specgram_type='linear' \
---output_path='data/librispeech/mean_std.npz'
-
-if [ $? -ne 0 ]; then
-    echo "Compute mean and stddev failed. Terminated."
-    exit 1
-fi
-
-
-echo "LibriSpeech Data preparation done."
-exit 0
diff --git a/examples/tiny/local/run_data.sh b/examples/tiny/local/run_data.sh
index 2acbe97be0b68919f81167d3cb1b82df991b51ea..3ad387dbcc966468dedf0b0935f030089e4209e5 100644
--- a/examples/tiny/local/run_data.sh
+++ b/examples/tiny/local/run_data.sh
@@ -7,9 +7,9 @@ fi
 
 # download data, generate manifests
 PYTHONPATH=.:$PYTHONPATH python3 ../librispeech/local/librispeech.py \
---manifest_prefix='data/manifest' \
+--manifest_prefix="data/manifest" \
 --target_dir="${MAIN_ROOT}/dataset/librispeech" \
---full_download='False'
+--full_download="False"
 
 if [ $? -ne 0 ]; then
     echo "Prepare LibriSpeech failed. Terminated."
@@ -21,8 +21,8 @@ head -n 64 data/manifest.dev-clean  > data/manifest.tiny
 # build vocabulary
 python3 ${MAIN_ROOT}/tools/build_vocab.py \
 --count_threshold=0 \
---vocab_path='data/vocab.txt' \
---manifest_paths='data/manifest.tiny'
+--vocab_path="data/vocab.txt" \
+--manifest_paths="data/manifest.tiny"
 
 if [ $? -ne 0 ]; then
     echo "Build vocabulary failed. Terminated."
@@ -32,10 +32,10 @@ fi
 
 # compute mean and stddev for normalizer
 python3 ${MAIN_ROOT}/tools/compute_mean_std.py \
---manifest_path='data/manifest.tiny' \
+--manifest_path="data/manifest.tiny" \
 --num_samples=64 \
---specgram_type='linear' \
---output_path='data/mean_std.npz'
+--specgram_type="linear" \
+--output_path="data/mean_std.npz"
 
 if [ $? -ne 0 ]; then
     echo "Compute mean and stddev failed. Terminated."
diff --git a/examples/tiny/local/run_infer.sh b/examples/tiny/local/run_infer.sh
index 09e86079d185288bb1a4ffca2188d2e8185384a0..bbaa094e9d52fe960250b2130d01a3b504acc17f 100644
--- a/examples/tiny/local/run_infer.sh
+++ b/examples/tiny/local/run_infer.sh
@@ -25,14 +25,14 @@ python3 -u $MAIN_ROOT/infer.py \
 --use_gru=False \
 --use_gpu=True \
 --share_rnn_weights=True \
---infer_manifest='data/manifest.test-clean' \
---mean_std_path='data/mean_std.npz' \
---vocab_path='data/vocab.txt' \
---model_path='checkpoints/step_final' \
+--infer_manifest="data/manifest.test-clean" \
+--mean_std_path="data/mean_std.npz" \
+--vocab_path="data/vocab.txt" \
+--model_path="checkpoints/step_final" \
 --lang_model_path="$MAIN_ROOT/models/lm/common_crawl_00.prune01111.trie.klm" \
---decoding_method='ctc_beam_search' \
---error_rate_type='wer' \
---specgram_type='linear'
+--decoding_method="ctc_beam_search" \
+--error_rate_type="wer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in inference!"
diff --git a/examples/tiny/local/run_infer_golden.sh b/examples/tiny/local/run_infer_golden.sh
index 4d5bbecc189f780c8b279cf0ad7453664a98ad2a..21663681ba1813c797aedac24bb9a7eb74f0d0c2 100644
--- a/examples/tiny/local/run_infer_golden.sh
+++ b/examples/tiny/local/run_infer_golden.sh
@@ -34,14 +34,14 @@ python3 -u ${MAIN_ROOT}/infer.py \
 --use_gru=False \
 --use_gpu=True \
 --share_rnn_weights=True \
---infer_manifest='data/manifest.test-clean' \
+--infer_manifest="data/manifest.test-clean" \
 --mean_std_path="${MAIN_ROOT}/models/librispeech/mean_std.npz" \
 --vocab_path="${MAIN_ROOT}/models/librispeech/vocab.txt" \
 --model_path="${MAIN_ROOT}/models/librispeech" \
 --lang_model_path="${MAIN_ROOT}/models/lm/common_crawl_00.prune01111.trie.klm" \
---decoding_method='ctc_beam_search' \
---error_rate_type='wer' \
---specgram_type='linear'
+--decoding_method="ctc_beam_search" \
+--error_rate_type="wer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in inference!"
diff --git a/examples/tiny/local/run_test.sh b/examples/tiny/local/run_test.sh
index bdc955125a24d5cf102b5fbe535d39bfaddefa58..ef1fa5a2dd094ae14e3781318d869bb135ad0ad8 100644
--- a/examples/tiny/local/run_test.sh
+++ b/examples/tiny/local/run_test.sh
@@ -25,14 +25,14 @@ python3 -u $MAIN_ROOT/test.py \
 --use_gru=False \
 --use_gpu=True \
 --share_rnn_weights=True \
---test_manifest='data/manifest.test-clean' \
---mean_std_path='data/mean_std.npz' \
---vocab_path='data/vocab.txt' \
---model_path='checkpoints/step_final' \
+--test_manifest="data/manifest.test-clean" \
+--mean_std_path="data/mean_std.npz" \
+--vocab_path="data/vocab.txt" \
+--model_path="checkpoints/step_final" \
 --lang_model_path="$MAIN_ROOT/models/lm/common_crawl_00.prune01111.trie.klm" \
---decoding_method='ctc_beam_search' \
---error_rate_type='wer' \
---specgram_type='linear'
+--decoding_method="ctc_beam_search" \
+--error_rate_type="wer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in evaluation!"
diff --git a/examples/tiny/local/run_test_golden.sh b/examples/tiny/local/run_test_golden.sh
index e818a932d2aec6b67346780030d7d929ef83164a..9983fade8e7e40a29f4423e126aabda1fab469f4 100644
--- a/examples/tiny/local/run_test_golden.sh
+++ b/examples/tiny/local/run_test_golden.sh
@@ -34,14 +34,14 @@ python3 -u $MAIN_ROOT/test.py \
 --use_gru=False \
 --use_gpu=True \
 --share_rnn_weights=True \
---test_manifest='data/manifest.test-clean' \
+--test_manifest="data/manifest.test-clean" \
 --mean_std_path="$MAIN_ROOT/models/librispeech/mean_std.npz" \
 --vocab_path="$MAIN_ROOT/models/librispeech/vocab.txt" \
 --model_path="$MAIN_ROOT/models/librispeech" \
 --lang_model_path="$MAIN_ROOT/models/lm/common_crawl_00.prune01111.trie.klm" \
---decoding_method='ctc_beam_search' \
---error_rate_type='wer' \
---specgram_type='linear'
+--decoding_method="ctc_beam_search" \
+--error_rate_type="wer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in evaluation!"
diff --git a/examples/tiny/local/run_train.sh b/examples/tiny/local/run_train.sh
index 88c6fec3d5014830e21f6a6e4aa1cddd6ede4fe3..de9dcbd74138f6e81bfd950ec7389ca34d8152ac 100644
--- a/examples/tiny/local/run_train.sh
+++ b/examples/tiny/local/run_train.sh
@@ -22,14 +22,14 @@ python3 -u ${MAIN_ROOT}/train.py \
 --use_gpu=True \
 --is_local=True \
 --share_rnn_weights=True \
---train_manifest='data/manifest.tiny' \
---dev_manifest='data/manifest.tiny' \
---mean_std_path='data/mean_std.npz' \
---vocab_path='data/vocab.txt' \
---output_model_dir='./checkpoints/' \
+--train_manifest="data/manifest.tiny" \
+--dev_manifest="data/manifest.tiny" \
+--mean_std_path="data/mean_std.npz" \
+--vocab_path="data/vocab.txt" \
+--output_model_dir="./checkpoints/" \
 --augment_conf_path="${MAIN_ROOT}/conf/augmentation.config" \
---specgram_type='linear' \
---shuffle_method='batch_shuffle_clipped' \
+--specgram_type="linear" \
+--shuffle_method="batch_shuffle_clipped" \
 
 if [ $? -ne 0 ]; then
     echo "Failed in training!"
diff --git a/examples/tiny/local/run_tune.sh b/examples/tiny/local/run_tune.sh
index 67501acf96e99fccf0a1432bf99b37b2ad81fd6f..b5cc4d6a1b49ab770b87c08a0dd83cc736228285 100644
--- a/examples/tiny/local/run_tune.sh
+++ b/examples/tiny/local/run_tune.sh
@@ -21,13 +21,13 @@ python3 -u $MAIN_ROOT/tools/tune.py \
 --use_gru=False \
 --use_gpu=True \
 --share_rnn_weights=True \
---tune_manifest='data/manifest.dev-clean' \
---mean_std_path='data/mean_std.npz' \
---vocab_path='data/vocab.txt' \
+--tune_manifest="data/manifest.dev-clean" \
+--mean_std_path="data/mean_std.npz" \
+--vocab_path="data/vocab.txt" \
 --model_path="$MAIN_ROOT/models/librispeech" \
 --lang_model_path="$MAIN_ROOT/models/lm/common_crawl_00.prune01111.trie.klm" \
---error_rate_type='wer' \
---specgram_type='linear'
+--error_rate_type="wer" \
+--specgram_type="linear"
 
 if [ $? -ne 0 ]; then
     echo "Failed in tuning!"
diff --git a/requirements.txt b/requirements.txt
index b480fdd705e20a5c4c85ecf5200e43483aef8323..8c57208a60cc0c3ab2f7b046f7a932a041013fbd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,3 @@ scipy==1.2.1
 resampy==0.1.5
 SoundFile==0.9.0.post1
 python_speech_features
-paddlepaddle-gpu==1.8.5