Read her book Careless People [1] where she shared many details. A crucial aspect of the China story is that FB/Meta conveyed to the Chinese officials that they were ready to do anything they asked for in the hope that they will be allowed in China.

[1] https://www.amazon.com/Careless-People-Cautionary-Power-Idea...

I wasn't planning on buying the book but ...

https://www.amazon.com/dp/1250391237?psc=1&smid=ATVPDKIKX0DE...