1. Xiaomei Chen School of Educational Sciences, Ludong University, Yantai, China;, Email: chenxiaomei9777@163.com
2. Jifeng Gong, Hebei University of Engineering, Handan, China
3. Bo Dai, Guilin Municipal Government Authorities, Guilin, China
4. Shuang Li, School of Educational Sciences, Ludong University, Yantai, China
5. Shiping Shi, Students' Affairs Office, North China Electric Power University, Baoding, China