diff --git a/.tools/build_docker.sh b/.tools/build_docker.sh
index 60474b1c6c56d7f84c8e5ee19132d93dbf19df9c..242f8de16639f6c333d99f2ff4c7e24f86788c98 100755
--- a/.tools/build_docker.sh
+++ b/.tools/build_docker.sh
@@ -64,7 +64,7 @@ RUN pip install -U nltk \
 RUN ${update_mirror_cmd}
     apt-get update && \
     apt-get install -y locales patch && \
-    apt-get -y install gcc curl git && \
+    apt-get -y install gcc curl git vim && \
     apt-get -y clean && \
     localedef -f UTF-8 -i en_US en_US.UTF-8 && \
     pip install --upgrade pip && \
diff --git a/01.fit_a_line/README.cn.md b/01.fit_a_line/README.cn.md
index 30e78a42ddb5c36072485c5dbecd63433dc91065..5aa1b1d5bc524a6d570130471d17733c894f0a0e 100644
--- a/01.fit_a_line/README.cn.md
+++ b/01.fit_a_line/README.cn.md
@@ -126,8 +126,18 @@ y_predict = paddle.layer.fc(input=x,
                                 size=1,
                                 act=paddle.activation.Linear())
 y = paddle.layer.data(name='y', type=paddle.data_type.dense_vector(1))
-cost = paddle.layer.mse_cost(input=y_predict, label=y)
+cost = paddle.layer.square_error_cost(input=y_predict, label=y)
 ```
+
+### 保存网络拓扑
+
+```python
+# Save the inference topology to protobuf.
+inference_topology = paddle.topology.Topology(layers=y_predict)
+with open("inference_topology.pkl", 'wb') as f:
+    inference_topology.serialize_for_inference(f)
+```
+
 ### 创建参数
 
 ```python
diff --git a/01.fit_a_line/README.md b/01.fit_a_line/README.md
index 814cd1c110581318e59c6a43e7ce47227d640cd3..3229664370d3c1568726c4f7a5a38fb200417f4d 100644
--- a/01.fit_a_line/README.md
+++ b/01.fit_a_line/README.md
@@ -132,8 +132,19 @@ y_predict = paddle.layer.fc(input=x,
                                 size=1,
                                 act=paddle.activation.Linear())
 y = paddle.layer.data(name='y', type=paddle.data_type.dense_vector(1))
-cost = paddle.layer.mse_cost(input=y_predict, label=y)
+cost = paddle.layer.square_error_cost(input=y_predict, label=y)
 ```
+
+### Save Topology
+
+```python
+# Save the inference topology to protobuf.
+inference_topology = paddle.topology.Topology(layers=y_predict)
+with open("inference_topology.pkl", 'wb') as f:
+    inference_topology.serialize_for_inference(f)
+```
+
+
 ### Create Parameters
 
 ```python
diff --git a/01.fit_a_line/index.cn.html b/01.fit_a_line/index.cn.html
index 933e5a4d8bfb53cb50a9675ea907d939203742da..c69a8dc1006cad4e2b051cc25fd2fed8a4e25706 100644
--- a/01.fit_a_line/index.cn.html
+++ b/01.fit_a_line/index.cn.html
@@ -168,8 +168,18 @@ y_predict = paddle.layer.fc(input=x,
                                 size=1,
                                 act=paddle.activation.Linear())
 y = paddle.layer.data(name='y', type=paddle.data_type.dense_vector(1))
-cost = paddle.layer.mse_cost(input=y_predict, label=y)
+cost = paddle.layer.square_error_cost(input=y_predict, label=y)
 ```
+
+### 保存网络拓扑
+
+```python
+# Save the inference topology to protobuf.
+inference_topology = paddle.topology.Topology(layers=y_predict)
+with open("inference_topology.pkl", 'wb') as f:
+    inference_topology.serialize_for_inference(f)
+```
+
 ### 创建参数
 
 ```python
diff --git a/01.fit_a_line/index.html b/01.fit_a_line/index.html
index f143f7fa65fe9ab4168739eaa9495292c64e3326..769cad945e6a32383711fcebc7dbd29e6e9140d3 100644
--- a/01.fit_a_line/index.html
+++ b/01.fit_a_line/index.html
@@ -174,8 +174,19 @@ y_predict = paddle.layer.fc(input=x,
                                 size=1,
                                 act=paddle.activation.Linear())
 y = paddle.layer.data(name='y', type=paddle.data_type.dense_vector(1))
-cost = paddle.layer.mse_cost(input=y_predict, label=y)
+cost = paddle.layer.square_error_cost(input=y_predict, label=y)
 ```
+
+### Save Topology
+
+```python
+# Save the inference topology to protobuf.
+inference_topology = paddle.topology.Topology(layers=y_predict)
+with open("inference_topology.pkl", 'wb') as f:
+    inference_topology.serialize_for_inference(f)
+```
+
+
 ### Create Parameters
 
 ```python
diff --git a/01.fit_a_line/train.py b/01.fit_a_line/train.py
index 255180d3c4322e8dd201e96917e288e3ee209d61..15f94f94124c0da5c5cd1f57863721f7145b9dc2 100644
--- a/01.fit_a_line/train.py
+++ b/01.fit_a_line/train.py
@@ -12,6 +12,11 @@ def main():
     y = paddle.layer.data(name='y', type=paddle.data_type.dense_vector(1))
     cost = paddle.layer.square_error_cost(input=y_predict, label=y)
 
+    # Save the inference topology to protobuf.
+    inference_topology = paddle.topology.Topology(layers=y_predict)
+    with open("inference_topology.pkl", 'wb') as f:
+        inference_topology.serialize_for_inference(f)
+
     # create parameters
     parameters = paddle.parameters.create(cost)
 
@@ -21,10 +26,6 @@ def main():
     trainer = paddle.trainer.SGD(
         cost=cost, parameters=parameters, update_equation=optimizer)
 
-    # save model proto as file
-    with open("model.proto", "w") as f:
-        f.write(str(trainer.__topology_in_proto__))
-
     feeding = {'x': 0, 'y': 1}
 
     # event_handler to print training and testing info