Update README.md

Author: yechaoa

README.md

@@ -98,4 +98,20 @@ star :kiss:
 - [CSDN-MaterialDesign](https://blog.csdn.net/yechaoa/category_7228044.html?spm=1001.2014.3001.5482)
 - [掘金](https://juejin.cn/user/659362706101735/posts)
 
+<br>
+
+```
+   Copyright [2017] [yechaoa]
+
+   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.
+```