Except China has only 2 BSL4 labs and though both are in big cities by Western standards, neither are near the costal population centers in which the majority of China actually resides.
Non-BSL4 labs shouldn't be ignored, though. Back in Feb 2020, a rumor circulating on Chinese social media said that there was a Non-BSL4 lab involved in researching bat viruses in the city. See my other comment as well.