TIAN Feng-ping
International School of Business & Finance,Sun Yat-sen University,Guangzhou 510275,ChinaZENG Yan
Lingnan( University) College,Sun Yat-sen University,Guangzhou 510275,ChinaLIANG Si-ying
Lingnan( University) College,Sun Yat-sen University,Guangzhou 510275,ChinaWEI Jia-wei
School of Mathematics,Sun Yat-sen University,Guangzhou 510275,China