No, I'm sorry. That's simply laughably untrue.
I'm sure the Chinese have no problems telling each other apart, and may have difficulty telling us apart. But there simply is not anywhere near the same amount of genetic variation in ethnic Chinese than there is in generic Northern Euopean mutt.
Puh-leeze. There was no doubt as much cross-shtupping in Asia as in Europe. Do you have one scintilla of evidence to support your contentions?