The gov of PRC doesn't want any "foreign cultural pollution".

But even those major challenges pale in comparison to the obstacles China’s government puts in the way of foreign productions. An overwhelming raft of regulations, permitting requirements, censorship, stringent financial controls, and extreme bias against what some Chinese politicians call “foreign cultural pollution” make it a daunting location for filming, even for producers with decades of experience there.

https://www.forbes.com/sites/robcain/2017/11/29/western-filmmakers-have-completely-stopped-shooting-in-china-heres-why/#6ba4b0187414