1. AI Research Center, Xiamen Meiya Pico Information Company Ltd., Xiamen, China
2. Center for Research on Intelligent Perception and Computing (CRIPAC), National Laboratory of Pattern Recognition (NLPR), Institute of Automation, Chinese Academy of Sciences (CASIA), Beijing, China
3. Fujian Key Laboratory for Intelligent Processing and Wireless Transmission of Media Information, College of Physics and Information Engineering, Fuzhou University, Fuzhou, China
4. Department of Computing, The Hong Kong Polytechnic University, Hung Hom, Hong Kong