I think if they want to operate in China, the Chinese government will tell them all traffic from Chinese customers has to be routed through a Chinese government controlled backbone operator, and the surveillance and censorship will be applied there. So Starlink won't have to directly apply any censorship. They will not be able to use laser links to route traffic of Chinese users to other countries. (Possibly the Chinese government might make an exception to that restriction for business use, such as low latency connections for financial markets.)

I'm not sure if China will let them operate though – nothing to do with censorship, to do with protectionism. They might want to reserve the Chinese market for a future Chinese controlled constellation.

Until such time as they are approved by the Chinese government to operate in China, they are going to geofence their satellites to refuse connections from terminals located on Chinese territory.