diff --git a/python/examples/lac/README.md b/python/examples/lac/README.md
index bc420186a09dfd0066c1abf0c0d95063e9cb0699..8d7adfb583f8e8e1fde0681a73f2bba65452fa87 100644
--- a/python/examples/lac/README.md
+++ b/python/examples/lac/README.md
@@ -2,28 +2,27 @@
 
 ([简体中文](./README_CN.md)|English)
 
-### Get model files and sample data
+### Get Model
 ```
-sh get_data.sh
+python -m paddle_serving_app.package --get_model lac
+tar -xzvf lac.tar.gz
 ```
 
-the package downloaded contains lac model config along with lac dictionary.
-
 #### Start RPC inference service
 
 ```
-python -m paddle_serving_server.serve --model jieba_server_model/ --port 9292
+python -m paddle_serving_server.serve --model lac_model/ --port 9292
 ```
 ### RPC Infer
 ```
-echo "我爱北京天安门" | python lac_client.py jieba_client_conf/serving_client_conf.prototxt lac_dict/
+echo "我爱北京天安门" | python lac_client.py lac_client/serving_client_conf.prototxt
 ```
 
-it will get the segmentation result
+It will get the segmentation result. 
 
 ### Start HTTP inference service
 ```
-python lac_web_service.py jieba_server_model/ lac_workdir 9292
+python lac_web_service.py lac_model/ lac_workdir 9292
 ```
 ### HTTP Infer
 
diff --git a/python/examples/lac/README_CN.md b/python/examples/lac/README_CN.md
index 449f474ca291053eb6880166c52814c9d4180f36..2379aa8ed69c026c6afd94b8b791774882eaf567 100644
--- a/python/examples/lac/README_CN.md
+++ b/python/examples/lac/README_CN.md
@@ -2,28 +2,27 @@
 
 (简体中文|[English](./README.md))
 
-### 获取模型和字典文件
+### 获取模型
 ```
-sh get_data.sh
+python -m paddle_serving_app.package --get_model lac
+tar -xzvf lac.tar.gz
 ```
 
-下载包里包含了lac模型和lac模型预测需要的字典文件
-
 #### 开启RPC预测服务
 
 ```
-python -m paddle_serving_server.serve --model jieba_server_model/ --port 9292
+python -m paddle_serving_server.serve --model lac_model/ --port 9292
 ```
 ### 执行RPC预测
 ```
-echo "我爱北京天安门" | python lac_client.py jieba_client_conf/serving_client_conf.prototxt lac_dict/
+echo "我爱北京天安门" | python lac_client.py lac_client/serving_client_conf.prototxt
 ```
 
 我们就能得到分词结果
 
 ### 开启HTTP预测服务
 ```
-python lac_web_service.py jieba_server_model/ lac_workdir 9292
+python lac_web_service.py lac_model/ lac_workdir 9292
 ```
 ### 执行HTTP预测
 
diff --git a/python/examples/lac/benchmark.py b/python/examples/lac/benchmark.py
index 53d0881ed74e5e19104a70fb93d6872141d27afd..64e935a608477d5841df1b64abf7b6eb35dd1a4b 100644
--- a/python/examples/lac/benchmark.py
+++ b/python/examples/lac/benchmark.py
@@ -16,7 +16,7 @@
 import sys
 import time
 import requests
-from lac_reader import LACReader
+from paddle_serving_app.reader import LACReader
 from paddle_serving_client import Client
 from paddle_serving_client.utils import MultiThreadRunner
 from paddle_serving_client.utils import benchmark_args
@@ -25,7 +25,7 @@ args = benchmark_args()
 
 
 def single_func(idx, resource):
-    reader = LACReader("lac_dict")
+    reader = LACReader()
     start = time.time()
     if args.request == "rpc":
         client = Client()
diff --git a/python/examples/lac/get_data.sh b/python/examples/lac/get_data.sh
deleted file mode 100644
index 29e6a6b2b3e995f78c37e15baf2f9a3b627ca9ef..0000000000000000000000000000000000000000
--- a/python/examples/lac/get_data.sh
+++ /dev/null
@@ -1,2 +0,0 @@
-wget --no-check-certificate https://paddle-serving.bj.bcebos.com/lac/lac_model_jieba_web.tar.gz
-tar -zxvf lac_model_jieba_web.tar.gz
diff --git a/python/examples/lac/lac_client.py b/python/examples/lac/lac_client.py
index 9c485a923e4d42b72af41f7b9ad45c5702ca93a1..ab9af730abb2f5b33f4d0292115b2f7bf682f278 100644
--- a/python/examples/lac/lac_client.py
+++ b/python/examples/lac/lac_client.py
@@ -15,7 +15,7 @@
 # pylint: disable=doc-string-missing
 
 from paddle_serving_client import Client
-from lac_reader import LACReader
+from paddle_serving_app.reader import LACReader
 import sys
 import os
 import io
@@ -24,7 +24,7 @@ client = Client()
 client.load_client_config(sys.argv[1])
 client.connect(["127.0.0.1:9292"])
 
-reader = LACReader(sys.argv[2])
+reader = LACReader()
 for line in sys.stdin:
     if len(line) <= 0:
         continue
@@ -32,4 +32,8 @@ for line in sys.stdin:
     if len(feed_data) <= 0:
         continue
     fetch_map = client.predict(feed={"words": feed_data}, fetch=["crf_decode"])
-    print(fetch_map)
+    begin = fetch_map['crf_decode.lod'][0]
+    end = fetch_map['crf_decode.lod'][1]
+    segs = reader.parse_result(line, fetch_map["crf_decode"][begin:end])
+
+    print({"word_seg": "|".join(segs)})
diff --git a/python/examples/lac/lac_web_service.py b/python/examples/lac/lac_web_service.py
index 62a7148b230029bc781fa550597df25471a7fc8d..9b1c6693b52393aee1294b521fe30fb1a9fd0d79 100644
--- a/python/examples/lac/lac_web_service.py
+++ b/python/examples/lac/lac_web_service.py
@@ -14,7 +14,7 @@
 
 from paddle_serving_server.web_service import WebService
 import sys
-from lac_reader import LACReader
+from paddle_serving_app.reader import LACReader
 
 
 class LACService(WebService):
diff --git a/python/paddle_serving_server/web_service.py b/python/paddle_serving_server/web_service.py
index 7f37b10be05e84e29cf6cda3cd3cc3d939910027..b3fcc1b880fcbffa1da884e4b68350c1870997c1 100755
--- a/python/paddle_serving_server/web_service.py
+++ b/python/paddle_serving_server/web_service.py
@@ -86,7 +86,7 @@ class WebService(object):
             for key in fetch_map:
                 fetch_map[key] = fetch_map[key].tolist()
             fetch_map = self.postprocess(
-                feed=feed, fetch=fetch, fetch_map=fetch_map)
+                feed=request.json["feed"], fetch=fetch, fetch_map=fetch_map)
             result = {"result": fetch_map}
         except ValueError:
             result = {"result": "Request Value Error"}
diff --git a/tools/serving_build.sh b/tools/serving_build.sh
index 7ac1ed31c22b0271e06266d9f905d94b77d1897c..989e48ead9864e717e573f7f0800a1afba2e934a 100644
--- a/tools/serving_build.sh
+++ b/tools/serving_build.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-
+set -x
 function unsetproxy() {
     HTTP_PROXY_TEMP=$http_proxy
     HTTPS_PROXY_TEMP=$https_proxy
@@ -455,15 +455,16 @@ function python_test_lac() {
     cd lac # pwd: /Serving/python/examples/lac
     case $TYPE in
         CPU)
-            sh get_data.sh
-            check_cmd "python -m paddle_serving_server.serve --model jieba_server_model/ --port 9292 &"
+            python -m paddle_serving_app.package --get_model lac
+            tar -xzvf lac.tar.gz
+            check_cmd "python -m paddle_serving_server.serve --model lac_model/ --port 9292 &"
             sleep 5
-            check_cmd "echo \"我爱北京天安门\" | python lac_client.py jieba_client_conf/serving_client_conf.prototxt lac_dict/"
+            check_cmd "echo \"我爱北京天安门\" | python lac_client.py lac_client/serving_client_conf.prototxt "
             echo "lac CPU RPC inference pass"
             kill_server_process
 
             unsetproxy # maybe the proxy is used on iPipe, which makes web-test failed.
-            check_cmd "python lac_web_service.py jieba_server_model/ lac_workdir 9292 &"
+            check_cmd "python lac_web_service.py lac_model/ lac_workdir 9292 &"
             sleep 5
             check_cmd "curl -H \"Content-Type:application/json\" -X POST -d '{\"feed\":[{\"words\": \"我爱北京天安门\"}], \"fetch\":[\"word_seg\"]}' http://127.0.0.1:9292/lac/prediction"
             # check http code