Yeah, you can get a 5 year D visa if you got a chinese wife.

Not as easy as you think, but you can screw the system if you have one by teaching unimpeded on L's. You don't know the half of it, mate!
Plenty smalltime agents, and schools in a jam coz laowai lied and didn't turn up to take jobs, that'll employ you and use special relationships to cover your ass. Rules are bent by the authorities in China as needs be, with no repercussions for laowai. And I have mostly stayed in the public sector, but never been a gw TC teacher, while teaching with L's.
BTW, pal. If you can, you should sue that gw scumbag. We don't need his kind in China.