diff --git a/gnes/client/cli.py b/gnes/client/cli.py
index 9f6037cd..3a90b4aa 100644
--- a/gnes/client/cli.py
+++ b/gnes/client/cli.py
@@ -1,3 +1,19 @@
+#  Tencent is pleased to support the open source community by making GNES available.
+#
+#  Copyright (C) 2019 THL A29 Limited, a Tencent company. 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 zipfile
 
 import grpc
diff --git a/gnes/composer/base.py b/gnes/composer/base.py
index 294e6562..d80cc95c 100644
--- a/gnes/composer/base.py
+++ b/gnes/composer/base.py
@@ -1,3 +1,18 @@
+#  Tencent is pleased to support the open source community by making GNES available.
+#
+#  Copyright (C) 2019 THL A29 Limited, a Tencent company. 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 copy
 import random
 import time
diff --git a/gnes/composer/flask.py b/gnes/composer/flask.py
index 9d94704f..27b9fcf0 100644
--- a/gnes/composer/flask.py
+++ b/gnes/composer/flask.py
@@ -1,3 +1,18 @@
+#  Tencent is pleased to support the open source community by making GNES available.
+#
+#  Copyright (C) 2019 THL A29 Limited, a Tencent company. 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 tempfile
 
 from .base import YamlComposer
@@ -8,7 +23,7 @@ class YamlComposerFlask:
     def __init__(self, args):
         self.args = args
 
-    def create_flask_app(self):
+    def _create_flask_app(self):
         try:
             from flask import Flask, request, abort, redirect, url_for
             from flask_compress import Compress
@@ -22,11 +37,11 @@ def create_flask_app(self):
         app = Flask(__name__)
 
         @app.route('/', methods=['GET'])
-        def get_homepage():
+        def _get_homepage():
             return YamlComposer(set_composer_parser().parse_args([])).build_all()['html']
 
         @app.route('/refresh', methods=['POST'])
-        def regenerate():
+        def _regenerate():
             data = request.form if request.form else request.json
             f = tempfile.NamedTemporaryFile('w', delete=False).name
             with open(f, 'w', encoding='utf8') as fp:
@@ -43,5 +58,5 @@ def regenerate():
         return app
 
     def run(self):
-        app = self.create_flask_app()
+        app = self._create_flask_app()
         app.run(port=self.args.http_port, threaded=True, host='0.0.0.0')
diff --git a/gnes/indexer/key_only.py b/gnes/indexer/key_only.py
index 4fd34191..9be22082 100644
--- a/gnes/indexer/key_only.py
+++ b/gnes/indexer/key_only.py
@@ -1,3 +1,19 @@
+#  Tencent is pleased to support the open source community by making GNES available.
+#
+#  Copyright (C) 2019 THL A29 Limited, a Tencent company. 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.
+
+
 from typing import List, Tuple
 
 import numpy as np
diff --git a/gnes/indexer/vector/annoy.py b/gnes/indexer/vector/annoy.py
index 2c3a9913..cacf4c64 100644
--- a/gnes/indexer/vector/annoy.py
+++ b/gnes/indexer/vector/annoy.py
@@ -1,3 +1,18 @@
+#  Tencent is pleased to support the open source community by making GNES available.
+#
+#  Copyright (C) 2019 THL A29 Limited, a Tencent company. 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 os
 from typing import List, Tuple
 
diff --git a/gnes/preprocessor/image/segmentation.py b/gnes/preprocessor/image/segmentation.py
index ed31688a..dbc99170 100644
--- a/gnes/preprocessor/image/segmentation.py
+++ b/gnes/preprocessor/image/segmentation.py
@@ -1,3 +1,18 @@
+#  Tencent is pleased to support the open source community by making GNES available.
+#
+#  Copyright (C) 2019 THL A29 Limited, a Tencent company. 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 io
 import os
 
diff --git a/gnes/preprocessor/image/sliding_window.py b/gnes/preprocessor/image/sliding_window.py
index a0500143..3a32d447 100644
--- a/gnes/preprocessor/image/sliding_window.py
+++ b/gnes/preprocessor/image/sliding_window.py
@@ -12,6 +12,7 @@
 #  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.
+
 import io
 from typing import List
 
diff --git a/gnes/router/map/simple.py b/gnes/router/map/simple.py
index 7e173b81..81db685b 100644
--- a/gnes/router/map/simple.py
+++ b/gnes/router/map/simple.py
@@ -1,3 +1,18 @@
+#  Tencent is pleased to support the open source community by making GNES available.
+#
+#  Copyright (C) 2019 THL A29 Limited, a Tencent company. 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.
+
 from typing import Generator
 
 from ..base import BaseMapRouter
diff --git a/gnes/router/reduce/chunk.py b/gnes/router/reduce/chunk.py
index 55286ff2..23868760 100644
--- a/gnes/router/reduce/chunk.py
+++ b/gnes/router/reduce/chunk.py
@@ -1,3 +1,18 @@
+#  Tencent is pleased to support the open source community by making GNES available.
+#
+#  Copyright (C) 2019 THL A29 Limited, a Tencent company. 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.
+
 from collections import defaultdict
 from typing import List
 
diff --git a/gnes/router/reduce/concat.py b/gnes/router/reduce/concat.py
index eea0f4b8..690a8067 100644
--- a/gnes/router/reduce/concat.py
+++ b/gnes/router/reduce/concat.py
@@ -1,3 +1,18 @@
+#  Tencent is pleased to support the open source community by making GNES available.
+#
+#  Copyright (C) 2019 THL A29 Limited, a Tencent company. 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.
+
 from typing import List
 
 import numpy as np
diff --git a/gnes/router/reduce/document.py b/gnes/router/reduce/document.py
index 245ec3dc..31623d23 100644
--- a/gnes/router/reduce/document.py
+++ b/gnes/router/reduce/document.py
@@ -1,3 +1,18 @@
+#  Tencent is pleased to support the open source community by making GNES available.
+#
+#  Copyright (C) 2019 THL A29 Limited, a Tencent company. 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.
+
 from typing import List
 
 from ..base import BaseReduceRouter