diff --git a/x2paddle/core/emitter.py b/x2paddle/core/emitter.py
new file mode 100644
index 0000000000000000000000000000000000000000..613454bf7280dec9bcd3ecbc0c9d015fc89e5ba8
--- /dev/null
+++ b/x2paddle/core/emitter.py
@@ -0,0 +1,24 @@
+#   Copyright (c) 2019  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.
+
+
+class Emitter(object):
+    def __init__(self):
+        print("Nothing done")
+
+    def save_inference_model(self):
+        print("Not Implement")
+
+    def save_python_code(self):
+        print("Not Implement")
diff --git a/x2paddle/core/graph.py b/x2paddle/core/graph.py
index 1ec62280d6fac87deca91a2eacaaa8bd7a866cac..3f28e90dd5124935f781dcfba7f20fa4fc4a8d66 100644
--- a/x2paddle/core/graph.py
+++ b/x2paddle/core/graph.py
@@ -21,10 +21,8 @@ class GraphNode(object):
         self.outputs = list()
         self.layer = layer
 
-        if layer_name is not None:
-            self.layer_name = layer_name
-        else:
-            self.layer_name = layer.name
+        assert layer_name is not None, "layer_name for GraphNode should not be None"
+        self.layer_name = layer_name
 
     def __hash__(self):
         return hash(self.layer.name)
@@ -70,6 +68,8 @@ class Graph(object):
                 num_inputs[node.layer_name] -= 1
                 if num_inputs[node.layer_name] == 0:
                     self.topo_sort.append(node.layer_name)
+        for i, tmp in enumerate(self.topo_sort):
+            print(tmp)
 
     def get_node(self, name):
         if name not in self.node_map:
diff --git a/x2paddle/emitter/tf_emitter.py b/x2paddle/emitter/tf_emitter.py
index a028662d70d6814266a52ccc6826e640c7671b7e..3968cd112489ad584f07fd624aec8f38d7e6a2ef 100644
--- a/x2paddle/emitter/tf_emitter.py
+++ b/x2paddle/emitter/tf_emitter.py
@@ -11,3 +11,7 @@
 # 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.
+
+from x2paddle.parser import TFGraph
+
+
diff --git a/x2paddle/optimizer/tf_optimizer.py b/x2paddle/optimizer/tf_optimizer.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0d45a6200dede038fc9d76d411a8e24ce7c73237 100644
--- a/x2paddle/optimizer/tf_optimizer.py
+++ b/x2paddle/optimizer/tf_optimizer.py
@@ -0,0 +1,21 @@
+#   Copyright (c) 2019  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.
+
+# TODO useless node remove
+
+# TODO identity node remove
+
+# TODO subgraph optimize
+
+# TODO compute optimize
diff --git a/x2paddle/parser/tf_parser.py b/x2paddle/parser/tf_parser.py
index 21d62a6aef665c4867e9e069b3540485bfe02614..5db5055372f47356b23cac7bf3307a4848f95c3c 100644
--- a/x2paddle/parser/tf_parser.py
+++ b/x2paddle/parser/tf_parser.py
@@ -19,7 +19,10 @@ import copy
 
 class TFGraphNode(GraphNode):
     def __init__(self, layer, layer_name=None):
-        super(TFGraphNode, self).__init__(layer, layer_name)
+        if layer_name is None:
+            super(TFGraphNode, self).__init__(layer, layer.name)
+        else:
+            super(TFGraphNode, self).__init__(layer, layer_name)
         self.layer_type = layer.op