1. Ph.D. Student, College of Merchant Marine, Shanghai Maritime Univ., Shanghai 201306, China; Associate Professor, International Business School, Shandong Jiaotong Univ., Weihai 264200, China (corresponding author).
2. Professor, College of Merchant Marine, Shanghai Maritime Univ., Shanghai 201306, China.
3. Master’s Student, School of Navigation and Shipping, Shandong Jiaotong Univ., Weihai 264200, China.