1. Graduate Student, School of Transportation and Logistics, Southwest Jiaotong Univ., Chengdu 611756, China. ORCID: .
2. Professor, School of Transportation and Logistics, Southwest Jiaotong Univ., Chengdu 611756, China.
3. Graduate Student, School of Foreign Languages, Chengdu Univ. of Technology, Chengdu 610095, China.
4. Associate Professor, School of Transportation and Logistics, Southwest Jiaotong Univ., Chengdu 611756, China (corresponding author). ORCID: .