Comment by thehorbach

The problem from a legal stand point is the fact that China does not support the international IP laws, which probably in your case means that you cannot put any legal pressure on them and as a startup without funding it might be a bad decision as you might have to put in a lot of capital in paying lawyers and all the fees around it. I would suggest that you try to convince them, that it's better for them to be a subsidiary of yours or just simply out-hustle them!