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!
But IPL is used for Hair Removal treatment not a haircut + you need a special gel over your skin to make sure that the beam doesn't burn your skin. You sure about the technology?
Hi, seems interesting, but I was thinking what separates you from the default Facebook events or when a user needs to post an update about the time he is coming?