My guess is food safety. Not quite real food safety, but also not made up. Some European cheeses are not available in here Australia because of regulations about how dairy products have to be processed (Pasteurisation I guess).
Not only might that logic work in China too, but the culture is less tolerant of a food-stuff what is after all curdled milk with a fungal infection. (And we in the west get grossed out by chicken feet!).