1. School of Tourism Management, Sun Yat-Sen University, Zhuhai, PR China
2. Key Laboratory of Sustainable Tourism Smart Assessment Technology, Sun Yat-Sen University, Ministry of Culture and Tourism of China, PR China
3. School of Hospitality Business Management, Carson College of Business, Washington State University, Pullman, WA, USA
4. School of Tourism and Hospitality, University of Johannesburg, Johannesburg, South Africa