Looks like it's been spray-painted since the markings don't follow to the head and face like most bamboo and cat sharks. When alive, it may have been a Chiloscyllium sp (possibly C. griseum); the gray bamboo shark.
It looks to me like it is a catshark, most likely Atelomycterus macleayi since it came from China. I think the eyes are too large to be a chiloscyllium and it also appears to be missing the nasal barbels of the chiloscyllium as well.