They entered an agreement with a Chinese company and gave them 51 % of the Xbox business in the FTZ. I think people don't understand that these consoles don't go to China. China is closed off. But China opened the Shanghai Free Trade Zone to test the ground for a more open approach. So these 5 million Xbox Ones and 200k annual PS4s (if they get approved) are not for all of China. They are to be sold only in the trade zone which is an area of about 30 km^2.
This is wrong. You operate out of the FTZ. Sony has already stated that they plan to manufacture parts of the PlayStation consoles there to fall within the regulations. The consoles are then sold all over China.
Again, MS got an approval for 5 million Xbones to be sold in China. Sony stated that they plan to produce 200k a year. That's absolutely not the same. Technically we haven't heard how many PS4s did Sony get approved in China yet.
Oh and both Sony and MS have formed JV with Chinese companies, where the Chinese partner owns 51% of the JV. That was mandated. Sony, however, formed a second JV where they own 70% which should deal with software, marketing, licensing and external support so kind of like SCEE/SCEA/SCEJA