1. Department of Port & Shipping Management, Guangzhou Maritime University, Guangzhou 510725, China
2. Navigation College, Jimei University, Xiamen 361021, China
3. Division of Business and Hospitality Management, College of Professional and Continuing Education, The Hong Kong Polytechnic University, Hong Kong, China
4. Department of Civil and Environmental Engineering, Florida A&M University-Florida State University, Tallahassee, FL 32310, USA