1. Department of Information Technology, Qinghai University, Xining, China
2. Department of Information Technology, Qinghai University and Qinghai Provincial Key Laboratory of Big Data in Finance and Artificial Intelligence Application Technology, Xining, China
3. Department of Information Technology, Guilin University of Electronic Technoloy, Guilin, China
4. Institute for Cyber Security, School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu
5. Department of Tibetan Medicine, Qinghai University, Xining, China