1. Digital Economy and Management School, Software Engineering Institute of Guangzhou, Guangzhou 510990, China
2. Faculty of Finance, City University of Macau, Macau 999078, China
3. Faculty of Business, Lingnan University, Hong Kong 999077, China
4. Department of Electronics, Software Engineering Institute of Guangzhou, Guangzhou 510990, China
5. School of Mathematics and Statistics, Hunan Normal University, Changsha 410081, China