1. Institute of Chinese Ethnic Information Technology, Northwest Minzu University, Lanzhou 730030, China
2. Key Laboratory of Linguistic and Cultural Computing, Ministry of Education, Northwest Minzu University, Lanzhou 730030, China
3. School of Electronics & Information Engineering, Liaoning University of Technology, Jinzhou 121000, China
4. Institute of Artificial General Intelligence, Bohai University, Jinzhou 121013, China