Gaming web sites publish articles on how to create PSN accounts in other regions[0] because this is common practice for gamers who care about imports (hence why Play-Asia will sell you out of region PSN gift cards). I imagine China is a special case because of the totalitarian dictatorship's restrictions on gaming and the fact that Playstation does business there which means they have to keep Winnie the Pooh[1] happy. The Chinese version of the PS5 seems to be region locked[2] which is not the case for PS5s sold in other countries.
