diff --git a/examples/aishell/s0/local/client.sh b/examples/aishell/s0/local/client.sh
deleted file mode 100755
index 3b59ad3dff202a11cdae438661fbb43348502ec6..0000000000000000000000000000000000000000
--- a/examples/aishell/s0/local/client.sh
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/bin/bash
-
-source path.sh
-
-# run on MacOS
-# brew install portaudio
-# pip install pyaudio
-# pip install keyboard
-
-# start demo client
-python3 -u ${BIN_DIR}/deploy/client.py \
---host_ip="localhost" \
---host_port=8086 \
-
-if [ $? -ne 0 ]; then
-    echo "Failed in starting demo client!"
-    exit 1
-fi
-
-exit 0
diff --git a/examples/aishell/s0/local/server.sh b/examples/aishell/s0/local/server.sh
deleted file mode 100755
index 2b88109932e619881128054bd23a012b27cb672d..0000000000000000000000000000000000000000
--- a/examples/aishell/s0/local/server.sh
+++ /dev/null
@@ -1,40 +0,0 @@
-#!/bin/bash
-# TODO: replace the model with a mandarin model
-
-if [[ $# != 1 ]];then
-   echo "usage: $1 checkpoint_path"
-   exit -1
-fi
-
-source path.sh
-
-# download language model
-bash local/download_lm_ch.sh
-if [ $? -ne 0 ]; then
-    exit 1
-fi
-
-# download well-trained model
-#bash local/download_model.sh
-#if [ $? -ne 0 ]; then
-#    exit 1
-#fi
-
-# start demo server
-CUDA_VISIBLE_DEVICES=0 \
-python3 -u ${BIN_DIR}/deploy/server.py \
---device 'gpu' \
---nproc 1 \
---config conf/deepspeech2.yaml \
---host_ip="localhost" \
---host_port=8086 \
---speech_save_dir="demo_cache" \
---checkpoint_path ${1}
-
-if [ $? -ne 0 ]; then
-    echo "Failed in starting demo server!"
-    exit 1
-fi
-
-
-exit 0
diff --git a/examples/aishell/s0/local/train.sh b/examples/aishell/s0/local/train.sh
index 3438a7357c65ac6366aee95b8669b9117dc6da2e..85d1d42c390958a34ddfe7f88a62aff5e093944b 100755
--- a/examples/aishell/s0/local/train.sh
+++ b/examples/aishell/s0/local/train.sh
@@ -20,7 +20,7 @@ fi
 mkdir -p exp
 
 seed=10086
-if [ ${seed} ]; then
+if [ ${seed} != 0 ]; then
     export FLAGS_cudnn_deterministic=True
 fi
 
@@ -32,7 +32,7 @@ python3 -u ${BIN_DIR}/train.py \
 --model_type ${model_type} \
 --seed ${seed}
 
-if [ ${seed} ]; then
+if [ ${seed} != 0 ]; then
     unset FLAGS_cudnn_deterministic
 fi
 
diff --git a/examples/aishell/s0/local/tune.sh b/examples/aishell/s0/local/tune.sh
deleted file mode 100755
index 59406cd5b3b28f17a3a0d4cbb1e01c97f6cb3703..0000000000000000000000000000000000000000
--- a/examples/aishell/s0/local/tune.sh
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/bin/bash
-
-# grid-search for hyper-parameters in language model
-python3 -u ${BIN_DIR}/tune.py \
---device 'gpu' \
---nproc 1 \
---config conf/deepspeech2.yaml \
---num_batches=10 \
---batch_size=128 \
---beam_size=300 \
---num_proc_bsearch=8 \
---num_alphas=10 \
---num_betas=10 \
---alpha_from=0.0 \
---alpha_to=5.0 \
---beta_from=-6 \
---beta_to=6 \
---cutoff_prob=1.0 \
---cutoff_top_n=40 \
---checkpoint_path ${1}
-
-if [ $? -ne 0 ]; then
-    echo "Failed in tuning!"
-    exit 1
-fi
-
-
-exit 0
diff --git a/examples/aishell/s0/run.sh b/examples/aishell/s0/run.sh
index e5ab12a591e8827a8a9d5c1eaceaf680d365d55d..71191c3ac60081eb128cc93a95e58c6feb17d510 100755
--- a/examples/aishell/s0/run.sh
+++ b/examples/aishell/s0/run.sh
@@ -27,7 +27,7 @@ fi
 
 if [ ${stage} -le 2 ] && [ ${stop_stage} -ge 2 ]; then
     # avg n best model
-    avg.sh exp/${ckpt}/checkpoints ${avg_num}
+    avg.sh best exp/${ckpt}/checkpoints ${avg_num}
 fi
 
 if [ ${stage} -le 3 ] && [ ${stop_stage} -ge 3 ]; then
diff --git a/examples/aishell/s1/local/train.sh b/examples/aishell/s1/local/train.sh
index ec17054ab1e6fe6b831846b2d7b10a4b9fb05479..2861e11ecad3eb9d5d19d683a734039dbfdaf06e 100755
--- a/examples/aishell/s1/local/train.sh
+++ b/examples/aishell/s1/local/train.sh
@@ -19,8 +19,8 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=1024
-if [ ${seed} ]; then
+seed=10086
+if [ ${seed} != 0]; then
     export FLAGS_cudnn_deterministic=True
 fi
 
@@ -31,7 +31,7 @@ python3 -u ${BIN_DIR}/train.py \
 --output exp/${ckpt_name} \
 --seed ${seed}
 
-if [ ${seed} ]; then
+if [ ${seed} != 0 ]; then
     unset FLAGS_cudnn_deterministic
 fi
 
diff --git a/examples/aishell/s1/run.sh b/examples/aishell/s1/run.sh
index d55d47ea626b56751eb89b2f861029e4e1b7bcdf..e3c008234340aac108b26e59075a39acb7b41d13 100644
--- a/examples/aishell/s1/run.sh
+++ b/examples/aishell/s1/run.sh
@@ -25,7 +25,7 @@ fi
 
 if [ ${stage} -le 2 ] && [ ${stop_stage} -ge 2 ]; then
     # avg n best model
-    avg.sh exp/${ckpt}/checkpoints ${avg_num}
+    avg.sh best exp/${ckpt}/checkpoints ${avg_num}
 fi
 
 if [ ${stage} -le 3 ] && [ ${stop_stage} -ge 3 ]; then
diff --git a/examples/callcenter/s1/local/train.sh b/examples/callcenter/s1/local/train.sh
index 928c6492c41302b1e863fbd0b3b3be7dafca7103..6e63df83a434fb421736f39e5d366e04d58bf5f5 100755
--- a/examples/callcenter/s1/local/train.sh
+++ b/examples/callcenter/s1/local/train.sh
@@ -19,8 +19,8 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=1024
-if [ ${seed} ]; then
+seed=10086
+if [ ${seed} != 0]; then
     export FLAGS_cudnn_deterministic=True
 fi
 
@@ -31,7 +31,7 @@ python3 -u ${BIN_DIR}/train.py \
 --output exp/${ckpt_name} \
 --seed ${seed}
 
-if [ ${seed} ]; then
+if [ ${seed} != 0 ]; then
     unset FLAGS_cudnn_deterministic
 fi
 
diff --git a/examples/callcenter/s1/run.sh b/examples/callcenter/s1/run.sh
index 52dd44eca36f92567a18377797c570de4481e8e1..305021f1919a50c6a2360ce51c7f7abcf851b14e 100644
--- a/examples/callcenter/s1/run.sh
+++ b/examples/callcenter/s1/run.sh
@@ -25,7 +25,7 @@ fi
 
 if [ ${stage} -le 2 ] && [ ${stop_stage} -ge 2 ]; then
     # avg n best model
-    avg.sh exp/${ckpt}/checkpoints ${avg_num}
+    avg.sh best exp/${ckpt}/checkpoints ${avg_num}
 fi
 
 if [ ${stage} -le 3 ] && [ ${stop_stage} -ge 3 ]; then
diff --git a/examples/librispeech/s0/README.md b/examples/librispeech/s0/README.md
index 5603d3c8aa1743b8aceae59f459f66d162fee24e..11bcf5f65df1ceb169096968ec9fa9ead23b58ff 100644
--- a/examples/librispeech/s0/README.md
+++ b/examples/librispeech/s0/README.md
@@ -1,10 +1,17 @@
 # LibriSpeech
 
+## Data
+| Data Subset | Duration in Seconds |
+| --- | --- |
+| data/manifest.train |  0.83s ~ 29.735s |
+| data/manifest.dev | 1.065 ~ 35.155s |  
+| data/manifest.test-clean | 1.285s ~ 34.955s |
+
 ## Deepspeech2
 
 | Model | Params | release |  Config | Test set | Loss | WER |  
 | --- | --- | --- | --- | --- | --- | --- |  
-| DeepSpeech2 | 42.96M | 2.2.0 | conf/deepspeech2.yaml + spec_aug | 14.49190807 | test-clean | 0.067283 |  
-| DeepSpeech2 | 42.96M | 2.1.0 | conf/deepspeech2.yaml | 15.184467315673828 | test-clean | 0.072154 |  
-| DeepSpeech2 | 42.96M | 2.0.0 | conf/deepspeech2.yaml | - | test-clean | 0.073973 |  
+| DeepSpeech2 | 42.96M | 2.2.0 | conf/deepspeech2.yaml + spec_aug | test-clean | 14.49190807 | 0.067283 |  
+| DeepSpeech2 | 42.96M | 2.1.0 | conf/deepspeech2.yaml | test-clean | 15.184467315673828 | 0.072154 |  
+| DeepSpeech2 | 42.96M | 2.0.0 | conf/deepspeech2.yaml | test-clean | - | 0.073973 |  
 | DeepSpeech2 | 42.96M | 1.8.5 | - | test-clean | - | 0.074939 |  
diff --git a/examples/librispeech/s0/local/train.sh b/examples/librispeech/s0/local/train.sh
index dcd21df34345e29b7dccadcb32aa2bbedf38ffbb..c95659acf1d14f058360b1235adb2a21d4ac3592 100755
--- a/examples/librispeech/s0/local/train.sh
+++ b/examples/librispeech/s0/local/train.sh
@@ -20,8 +20,8 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=1024
-if [ ${seed} ]; then
+seed=10086
+if [ ${seed} != 0 ]; then
     export FLAGS_cudnn_deterministic=True
 fi
 
@@ -33,7 +33,7 @@ python3 -u ${BIN_DIR}/train.py \
 --model_type ${model_type} \
 --seed ${seed}
 
-if [ ${seed} ]; then
+if [ ${seed} != 0 ]; then
     unset FLAGS_cudnn_deterministic
 fi
 
diff --git a/examples/librispeech/s0/local/tune.sh b/examples/librispeech/s0/local/tune.sh
deleted file mode 100755
index c344e77e58a52c803bd69e1bd27804c8d0072415..0000000000000000000000000000000000000000
--- a/examples/librispeech/s0/local/tune.sh
+++ /dev/null
@@ -1,33 +0,0 @@
-#!/bin/bash
-
-if [ $# != 1 ];then
-    echo "usage: tune ckpt_path"
-    exit 1
-fi
-
-# grid-search for hyper-parameters in language model
-python3 -u ${BIN_DIR}/tune.py \
---device 'gpu' \
---nproc 1 \
---config conf/deepspeech2.yaml \
---num_batches=-1 \
---batch_size=128 \
---beam_size=500 \
---num_proc_bsearch=12 \
---num_alphas=45 \
---num_betas=8 \
---alpha_from=1.0 \
---alpha_to=3.2 \
---beta_from=0.1 \
---beta_to=0.45 \
---cutoff_prob=1.0 \
---cutoff_top_n=40 \
---checkpoint_path ${1}
-
-if [ $? -ne 0 ]; then
-    echo "Failed in tuning!"
-    exit 1
-fi
-
-
-exit 0
diff --git a/examples/librispeech/s0/run.sh b/examples/librispeech/s0/run.sh
index c7902a56a882abecddd36b6440f9c88e134d628b..af47fb9b8b70d7d30eead78722303d0de58c4b06 100755
--- a/examples/librispeech/s0/run.sh
+++ b/examples/librispeech/s0/run.sh
@@ -25,7 +25,7 @@ fi
 
 if [ ${stage} -le 2 ] && [ ${stop_stage} -ge 2 ]; then
     # avg n best model
-    avg.sh exp/${ckpt}/checkpoints ${avg_num}
+    avg.sh best exp/${ckpt}/checkpoints ${avg_num}
 fi
 
 if [ ${stage} -le 3 ] && [ ${stop_stage} -ge 3 ]; then
diff --git a/examples/librispeech/s1/local/train.sh b/examples/librispeech/s1/local/train.sh
index ec17054ab1e6fe6b831846b2d7b10a4b9fb05479..c57946a617e73c37c842c53aab7dde2a95d9d2c6 100755
--- a/examples/librispeech/s1/local/train.sh
+++ b/examples/librispeech/s1/local/train.sh
@@ -19,8 +19,8 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=1024
-if [ ${seed} ]; then
+seed=10086
+if [ ${seed} != 0]; then
     export FLAGS_cudnn_deterministic=True
 fi
 
@@ -31,7 +31,7 @@ python3 -u ${BIN_DIR}/train.py \
 --output exp/${ckpt_name} \
 --seed ${seed}
 
-if [ ${seed} ]; then
+if [ ${seed} != 0]; then
     unset FLAGS_cudnn_deterministic
 fi
 
diff --git a/examples/librispeech/s1/run.sh b/examples/librispeech/s1/run.sh
index def10ab05d16e9c20ae60f52546a99191e0653d0..aecd3f617d85c9477c804a60ef43e3b263934f77 100755
--- a/examples/librispeech/s1/run.sh
+++ b/examples/librispeech/s1/run.sh
@@ -24,7 +24,7 @@ fi
 
 if [ ${stage} -le 2 ] && [ ${stop_stage} -ge 2 ]; then
     # avg n best model
-    avg.sh exp/${ckpt}/checkpoints ${avg_num}
+    avg.sh best exp/${ckpt}/checkpoints ${avg_num}
 fi
 
 if [ ${stage} -le 3 ] && [ ${stop_stage} -ge 3 ]; then
diff --git a/examples/librispeech/s2/local/train.sh b/examples/librispeech/s2/local/train.sh
index c75252594850d063e1288b8076719bdead7f7abe..a75e2bb2608165c587528ca85525a4f3ca9964e5 100755
--- a/examples/librispeech/s2/local/train.sh
+++ b/examples/librispeech/s2/local/train.sh
@@ -19,8 +19,8 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=1024
-if [ ${seed} ]; then
+seed=10086
+if [ ${seed} != 0 ]; then
     export FLAGS_cudnn_deterministic=True
 fi
 
@@ -32,7 +32,7 @@ python3 -u ${BIN_DIR}/train.py \
 --output exp/${ckpt_name} \
 --seed ${seed}
 
-if [ ${seed} ]; then
+if [ ${seed} != 0 ]; then
     unset FLAGS_cudnn_deterministic
 fi
 
diff --git a/examples/librispeech/s2/run.sh b/examples/librispeech/s2/run.sh
index 26398dd14b2c26390c357ca68fd2a5c9945222db..46c8ea5d8fa68d2676a4fa1201f04e89de096e44 100755
--- a/examples/librispeech/s2/run.sh
+++ b/examples/librispeech/s2/run.sh
@@ -25,7 +25,7 @@ fi
 
 if [ ${stage} -le 2 ] && [ ${stop_stage} -ge 2 ]; then
     # avg n best model
-    avg.sh exp/${ckpt}/checkpoints ${avg_num}
+    avg.sh best exp/${ckpt}/checkpoints ${avg_num}
 fi
 
 if [ ${stage} -le 3 ] && [ ${stop_stage} -ge 3 ]; then
diff --git a/examples/punctuation_restoration/README.md b/examples/punctuation_restoration/README.md
index f2ca769961bc1aaeb8d40b43afae191842a68a74..42ae0db3a49ef1e16edcad5ad9ae7ed02079adec 100644
--- a/examples/punctuation_restoration/README.md
+++ b/examples/punctuation_restoration/README.md
@@ -1,3 +1,3 @@
 # Punctation Restoration
 
-Please using `https://github.com/745165806/PaddleSpeechTask` to do this task.
+Please using [PaddleSpeechTask](https://github.com/745165806/PaddleSpeechTask] to do this task.
diff --git a/examples/ted_en_zh/t0/local/train.sh b/examples/ted_en_zh/t0/local/train.sh
index ec17054ab1e6fe6b831846b2d7b10a4b9fb05479..928356f96e83563082d6579db6068b80974f9a1d 100755
--- a/examples/ted_en_zh/t0/local/train.sh
+++ b/examples/ted_en_zh/t0/local/train.sh
@@ -19,8 +19,8 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=1024
-if [ ${seed} ]; then
+seed=10086
+if [ ${seed} != 0 ]; then
     export FLAGS_cudnn_deterministic=True
 fi
 
@@ -31,7 +31,7 @@ python3 -u ${BIN_DIR}/train.py \
 --output exp/${ckpt_name} \
 --seed ${seed}
 
-if [ ${seed} ]; then
+if [ ${seed} != 0  ]; then
     unset FLAGS_cudnn_deterministic
 fi
 
diff --git a/examples/ted_en_zh/t0/run.sh b/examples/ted_en_zh/t0/run.sh
index 26fadb608c347b600e069cca8e257362430b6546..7508f0e8abe56541b055b5684f73cfe6e788ccf2 100755
--- a/examples/ted_en_zh/t0/run.sh
+++ b/examples/ted_en_zh/t0/run.sh
@@ -26,7 +26,7 @@ fi
 
 if [ ${stage} -le 2 ] && [ ${stop_stage} -ge 2 ]; then
     # avg n best model
-    ../../utils/avg.sh exp/${ckpt}/checkpoints ${avg_num}
+    avg.sh best exp/${ckpt}/checkpoints ${avg_num}
 fi
 
 if [ ${stage} -le 3 ] && [ ${stop_stage} -ge 3 ]; then
diff --git a/examples/timit/s1/local/train.sh b/examples/timit/s1/local/train.sh
index ec17054ab1e6fe6b831846b2d7b10a4b9fb05479..3e2e4522d54bb1be2b1ba2ecf6766bb2715cf42e 100755
--- a/examples/timit/s1/local/train.sh
+++ b/examples/timit/s1/local/train.sh
@@ -19,8 +19,8 @@ echo "using ${device}..."
 
 mkdir -p exp
 
-seed=1024
-if [ ${seed} ]; then
+seed=10086
+if [ ${seed} != 0  ]; then
     export FLAGS_cudnn_deterministic=True
 fi
 
@@ -31,7 +31,7 @@ python3 -u ${BIN_DIR}/train.py \
 --output exp/${ckpt_name} \
 --seed ${seed}
 
-if [ ${seed} ]; then
+if [ ${seed} != 0 ]; then
     unset FLAGS_cudnn_deterministic
 fi
 
diff --git a/examples/timit/s1/run.sh b/examples/timit/s1/run.sh
index 67ce78377a4752546cfff1704ad00b1ae9997a76..75a2e0c52d72684a7b79805acd5d39a2d7c09fd0 100755
--- a/examples/timit/s1/run.sh
+++ b/examples/timit/s1/run.sh
@@ -26,7 +26,7 @@ fi
 
 if [ ${stage} -le 2 ] && [ ${stop_stage} -ge 2 ]; then
     # avg n best model
-    avg.sh exp/${ckpt}/checkpoints ${avg_num}
+    avg.sh best exp/${ckpt}/checkpoints ${avg_num}
 fi
 
 if [ ${stage} -le 3 ] && [ ${stop_stage} -ge 3 ]; then
diff --git a/examples/tiny/s0/local/train.sh b/examples/tiny/s0/local/train.sh
index d42e51faca6e9b6afa2cb6599506c7e9af92c343..bf4766ee3c2747082b33646d615b6926b994b9dc 100755
--- a/examples/tiny/s0/local/train.sh
+++ b/examples/tiny/s0/local/train.sh
@@ -19,8 +19,8 @@ fi
 
 mkdir -p exp
 
-seed=1024
-if [ ${seed} ]; then
+seed=10086
+if [ ${seed} != 0  ]; then
     export FLAGS_cudnn_deterministic=True
 fi
 
@@ -32,7 +32,7 @@ python3 -u ${BIN_DIR}/train.py \
 --model_type ${model_type} \
 --seed ${seed}
 
-if [ ${seed} ]; then
+if [ ${seed} != 0  ]; then
     unset FLAGS_cudnn_deterministic
 fi
 
diff --git a/examples/tiny/s0/run.sh b/examples/tiny/s0/run.sh
index 408b28fd0982b46d209c2a3dc6b0b375b55b3d84..f39fb3fa022a2b35e72823671ed8bf3161f4ee18 100755
--- a/examples/tiny/s0/run.sh
+++ b/examples/tiny/s0/run.sh
@@ -27,7 +27,7 @@ fi
 
 if [ ${stage} -le 2 ] && [ ${stop_stage} -ge 2 ]; then
     # avg n best model
-    avg.sh exp/${ckpt}/checkpoints ${avg_num}
+    avg.sh best exp/${ckpt}/checkpoints ${avg_num}
 fi
 
 if [ ${stage} -le 3 ] && [ ${stop_stage} -ge 3 ]; then
diff --git a/examples/tiny/s1/local/train.sh b/examples/tiny/s1/local/train.sh
index 2fb3a95ab5925c48e96bdc1326020db0ee5fe571..48968f63c9030b2072c7d6617da9edc34bb7f2e2 100755
--- a/examples/tiny/s1/local/train.sh
+++ b/examples/tiny/s1/local/train.sh
@@ -18,8 +18,8 @@ fi
 
 mkdir -p exp
 
-seed=1024
-if [ ${seed} ]; then
+seed=10086
+if [ ${seed} != 0 ]; then
     export FLAGS_cudnn_deterministic=True
 fi
 
@@ -30,7 +30,7 @@ python3 -u ${BIN_DIR}/train.py \
 --output exp/${ckpt_name} \
 --seed ${seed}
 
-if [ ${seed} ]; then
+if [ ${seed} != 0 ]; then
     unset FLAGS_cudnn_deterministic
 fi
 
diff --git a/examples/tiny/s1/run.sh b/examples/tiny/s1/run.sh
index 41f845b054bf5f7f49454cf3af707507f479ffe9..d288e31a45d32bc6ac3ccced9731af4156074dca 100755
--- a/examples/tiny/s1/run.sh
+++ b/examples/tiny/s1/run.sh
@@ -25,7 +25,7 @@ fi
 
 if [ ${stage} -le 2 ] && [ ${stop_stage} -ge 2 ]; then
     # avg n best model
-    avg.sh exp/${ckpt}/checkpoints ${avg_num}
+    avg.sh best exp/${ckpt}/checkpoints ${avg_num}
 fi
 
 if [ ${stage} -le 3 ] && [ ${stop_stage} -ge 3 ]; then