1. School of Economics, Shanxi University of Finance and Economics, Shanxi, China
2. School of Economics and Business Administration, Chongqing University, Chongqing, China; Institution of Digital Energy & Technical Economics, Chongqing University, Chongqing, China
3. School of Economics and Business Administration, Chongqing University, Chongqing, China
4. Sichuan International Studies University, Chongqing, China