The WT has TONS of underground activity going on in China. It's easy for them to create a corporation that has no direct ties to the banned religion. They did similar things in the US when buying up property in New York. I personally know that they have corporations that they own/use in China for buying and warehousing all manner of Chinese made products to be used in other countries. I don't know the corporation names but I know some that have worked at them in China.
I could see them buying an mountain and using "need greaters" or Chinese JWs to mine the granite.