1. College of Finance and Economics, Hainan Vocational University of Science and Technology, Haikou 571126, Hainan, China
2. Network and Educational Technology Center, Qiongtai Normal University, Haikou 571127, Hainan, China
3. Office of Academic Research, Hainan Vocational College of Political Science and Law, Haikou 570100, Hainan, China