1. Business School, Shandong University, Research Center of Tourism and Service Management, Weihai, China
2. Rosen College of Hospitality Management, University of Central Florida, Orlando, USA
3. Visiting Chair Professor, School of Hospitality Management, National Kaohsiung University of Hospitality and Tourism, Kaohsiung City, Taiwan
4. Business School, Shandong University, Weihai, China