First Author:   Wei-fong Pan Research Institute, First Capital Securities Co., Ltd. weifongpan@gmail.com   18/F, Investment Bank Building, No. 115, Fuhua 1st Rd,, Futian Dist. Shenzhen, 518000, China   +8618565687120(Phone) +8618565687120(Fax) https://weifongpan.wixsite.com/research/