I have been offered only a few interview in China for game programmer job, they’re mainly looking at your experience in the domain. However because most company don’t offer relocation for a lot of people in a year, the selection can be pretty tougth ( most of the time you have to go througth 3-4 interview and technical test ).
I would guess that if you are already in China and they don’t have to relocate you it might boost your chance.