diff --git a/doc/ps_background.md b/doc/ps_background.md
index 567c30a9672be8b3fa02da22e755555c68d38ea8..7c5e52991e199cf4e333134d3e0608fbd57bc992 100644
--- a/doc/ps_background.md
+++ b/doc/ps_background.md
@@ -1,5 +1,6 @@
 # 参数服务器训练简介
 
+飞桨参数服务器原理介绍请参见： [飞桨参数服务器](https://github.com/PaddlePaddle/Fleet/blob/develop/markdown_doc/transpiler/transpiler_cpu.md)
 
 如图1所示，参数服务器是分布式训练领域普遍采用的编程架构，主要包含Server和Worker两个部分，其中Server负责参数的存储和更新，而Worker负责训练。飞桨的参数服务器功能也是基于这种经典的架构进行设计和开发的，同时在这基础上进行了SGD（Stochastic Gradient Descent）算法的创新（Geometric Stochastic Gradient Descent）。当前经过大量的实验验证，最佳的方案是每台机器上启动Server和Worker两个进程，而一个Worker进程中可以包含多个用于训练的线程。
 <p align="center">
diff --git a/models/contentunderstanding/classification/model.py b/models/contentunderstanding/classification/model.py
index b47dc44686f7424789ea6318e2f492faeaa5cfff..833e9445055aea83563dc164392c8d052fd94d70 100644
--- a/models/contentunderstanding/classification/model.py
+++ b/models/contentunderstanding/classification/model.py
@@ -1,3 +1,17 @@
+#   Copyright (c) 2020 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.
+
 import paddle.fluid as fluid
 import math
 
@@ -34,8 +48,7 @@ class Model(ModelBase):
         fc_1 = fluid.layers.fc(input=[conv], size=hid_dim)
         # softmax layer
         prediction = fluid.layers.fc(input=[fc_1], size=class_dim, act="softmax")
-        #if is_prediction:
-        #    return prediction
+
         cost = fluid.layers.cross_entropy(input=prediction, label=label)
         avg_cost = fluid.layers.mean(x=cost)
         acc = fluid.layers.accuracy(input=prediction, label=label) 
@@ -50,9 +63,9 @@ class Model(ModelBase):
         return self.metrics
 
     def optimizer(self):
-        learning_rate = 0.01#envs.get_global_env("hyper_parameters.base_lr", None, self._namespace)
+        learning_rate = 0.01
         sgd_optimizer = fluid.optimizer.Adagrad(learning_rate=learning_rate)
-        #sgd_optimizer.minimize(avg_cost)
+
         return sgd_optimizer
 
 
diff --git a/models/contentunderstanding/classification/reader.py b/models/contentunderstanding/classification/reader.py
index efee0196833064db236c0a88458ea1ce34094313..9a93211ed6997c342c412b7c2a043f89838332da 100644
--- a/models/contentunderstanding/classification/reader.py
+++ b/models/contentunderstanding/classification/reader.py
@@ -1,3 +1,17 @@
+#   Copyright (c) 2020 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.
+
 import re
 import sys
 import collections
diff --git a/models/contentunderstanding/tagspace/model.py b/models/contentunderstanding/tagspace/model.py
index aeb569c6b712fe10e698c2def30ae17004ac7e9a..8b73da91513e34780d2c0f242ac58a5adb970c9a 100644
--- a/models/contentunderstanding/tagspace/model.py
+++ b/models/contentunderstanding/tagspace/model.py
@@ -1,3 +1,17 @@
+#   Copyright (c) 2020 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.
+
 import paddle.fluid as fluid
 import math
 
diff --git a/models/contentunderstanding/tagspace/reader.py b/models/contentunderstanding/tagspace/reader.py
index 93446e712f204c7caaf59c10d116e89e818ae78f..fb973f7eb92eb9d1195a8c9e9aeaa3be52b2dc17 100644
--- a/models/contentunderstanding/tagspace/reader.py
+++ b/models/contentunderstanding/tagspace/reader.py
@@ -1,3 +1,17 @@
+#   Copyright (c) 2020 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.
+
 import re
 import sys
 import collections