I do not know why only a few Chinese students select Yale.
As far as I know, the Dean of the School, Robert A.M. Stern, is a respected architect and historian and the good thing about the program he oversees at Yale is that he makes it a point to hire professors with very different views [which are not in many cases the same as his own] about architecture. This exposes the student to many diverse ideas and forces the student to come to his or her own conclusions about what architecture is. This is not necessarily the case at other schools, where there can be prevailing ‘trends’ that are embraced by faculty who all think alike and more or less try to get their students to think the same way.
To be honest, if you need a harmonious environment to generate your own idea about architecture. Yale should be the one of the better choices.