1. Department of Finance, Wuhan University, Wuhan, Hubei, P.R. China
2. Department of Finance, Hubei University of Economics, Wuhan, Hubei, P.R.China
3. Department of Financial Technology and Corporate Finance, Shanghai International Studies University, Shanghai, P.R. China
4. Department of Finance, Southwestern University of Finance and Economics, Chengdu, Sichuan, P.R. China