Trying to switch App Store region to China, but stuck on payment method

I’m trying to get a One Piece game that’s exclusive to China, however I’m stuck on the payment method. It won’t let me set it to “None” and using a generator online doesn’t manage to fool it. I’m not planning on spending any actual money I just need to download these two free things yet I can’t get past this. Any help would be greatly appreciated

(also I have tried to make a Chinese Apple Account and it always just says that it’s unable to make it at this time)