I've talked to some Chinese users on the forums and they said usually release the nude patches after the whole game is finished, so the game doesn't get removed from the Steam store (for them) because of chinese gov.
Chinese players seem to be the target, so it doesn't surprise they're trying to make it work for them.
"The relevant R18 content will only be released after the Chinese region is locked."
"It's still the first experience version. If they release nude content in advance, they will lose part of the Chinese market, because unfortunately, our country does not allow this content to appear in the game. However, judging from the updated DLC, that part of the content should still be available."