1. School of Artificial Intelligence,
Chongqing University of Technology, Chongqing, China.
2. Multimedia Information Processing Laboratory at the Department of Computer Science,
Kiel University, Kiel, Germany.
3. Advanced Institute of Information Technology (AIIT),
Peking University, Hangzhou, China.
4. Hangzhou Linxrobot Co. Ltd., Hangzhou, China.
5. National Key Laboratory of General Artificial Intelligence,
Peking University, Shenzhen Graduate School, Shenzhen, China.