this is a fun database on the topic of monkey blood / no monkey blood
http://www.rhesusnegative.net/themission/bloodtypefrequencies/
Rh-negative is about 6% of world population in general, but less than 1% in China ( at what, 20% of the world's population?) ; i wonder if there is a connection to what you say there, in that they are outbred after being conquered over and over, for like ever ; true mutts
drunk diver, eh?