License

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](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.

Contact: Chaojie Wang xd_silly@163.com, Wei Zhao 13279389260@163.com, Jiawen Wu wjw19960807@163.com

Copyright (c), 2020, Chaojie Wang, Wei Zhao, Jiawen Wu, Xinyang Liu, Jie Ren, Yewen Li, Hao Zhang, Bo Chen and Mingyuan Zhou