Dont be ridiculous. He Hua and Ou-Yang Hui held much more senior positions than Huang Yiping in top IB firms. In addition, Professor He was a tenured professor at UC Berkeley, Yale and Professor Ou-Yang received tenured offers at UNC chapel Hill. Professor Mei and Professor Liu all have their own companies. the network CKGSB has in Wall Street is not comparable anywhere in China.
It should also be noted all top US schools are research based. Without top research a business school will have no soul. The importance of top professors was recognized years ago by Tsinghua President Mei