Tesla should be very wary of the very real threat from corporate espionage in China. Brining a factory to China would allow a bad actor to really get into enterprise and create even better clones. Tesla wouldn't be able to keep up financially if Chinese manufactures built cars using Tesla research resources. side thought: Maybe TESLA turns into a research company that sells its IP to manufactures instead of actually…
Perhaps they feel that a little espionage is worth it to get 500000 electric cars a year onto Chinese roads?