SHI Yong-qiang
School of Economics and Commerce,South China University of Technology,Guangzhou 510006,ChinaPENG Shu
School of Economics and Commerce,South China University of Technology,Guangzhou 510006,ChinaZHANG Zhi-yong
School of Economics and Commerce,South China University of Technology,Guangzhou 510006,ChinaYANG Lei
School of Economics and Commerce,South China University of Technology,Guangzhou 510006,China