1. Department of Tourism Management, Business School, Guangxi University, No. 100 Daxue Rd., Nanning 530004, China
2. Economics School, Guangxi University, No. 100 Daxue Rd., Nanning 530004, China
3. School of Hotel and Tourism Management, The Hong Kong Polytechnic University, 17 Science Museum Road 818, TST East, Kowloon, Hong Kong SAR 100872, China