There's this article from back in 2014. explaining how it's all done voluntarily "just-in-case", and that the Chinese "skulls censorship thing" is actually a myth. Still, 'tis old information so take it with a grain of salt.
Does anyone know the details for having skulls related to the Chinese market? I know you don't want actual skulls because of this, but does it count if they are sculpted into the armor or metal? Warhammer has a lot of skulls and skull designs.