1. School of Informatics, Xiamen University, Xiamen, China
2. Ruijie Network Company Ltd, Fuzhou, China
3. Future Network of Intelligence Institute, the School of Science and Engineering, and the Guangdong Provincial Key Laboratory of Future Networks of Intelligence, The Chinese University of Hong Kong, Shenzhen, China
4. State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing, China