No Benefit.. You can be thrown away back to where u come from one day by the govt for minor immigration offence..

In my experience, you can be 'requested to exit the country'. Exit to the nearest neighboring country with your marriage certificate. Apply for a Chinese L there to visit your Chinese spouse, Then re-enter. A hell of a lot cheaper to go to the likes of Ulanbatar ny train than fly back to the USA, for example. Besides, you can kill two birds with one stone by turning your visa run into a vacation!