1. College of Management Science, Chengdu University of Technology, Chengdu 610059, China
2. School of Marketing and Logistics Management, Nanjing University of Finance and Economics, Nanjing 210023, China
3. School of Economics, Southwest Minzhu University, Chengdu 610041, China
4. School of Computer Science, Southwest Petroleum University, Chengdu 610500, China