A true story of unfair treatment:
More than a few years ago I was teaching legally with a Z,but my teaching contract finished beyond the last date on my RP.The college FAO was too busy to accompany me to the PSB office in Hohhot to extend my RP,and my Chinese wife,an ex-villager didn't like going there with me because she was always treated in an unfriendly manner by the staff there.So,I visited the PSB office alone with said contract and my RP to ask for an extension to my RP to make my working in China legal until the end of my contract.
From memory,I can say that the RP finished on Nov 11th,whereas my contract finished on Xmas Day.After trying to explain what was needed to the clerkess,whose English was completely rubbish,probably she got the job through special relationship,ie her father a powerful government cadre,she said I couldn't get an extension without a new teaching contract.I left,and some 120 days later,discovered that I had been living illegally in China,after a college I'd applied to for a job informed me of it.
So,I turned myself in,and apologised.Yep,my passport was taken from me after the clerkess denied all knowledge of my unsuccessful visit to the PSB Office to extend my RP.The PSB office did not have anyone who could speak English other than the lying and incompetent clerkess.I was fingerprinted,asked to sign a letter of apology,and given 10 days to get out of China once I paid my fine,the maximum,a 5000 Yuan ceiling,at 500 Yuan a day for overstaying my RP.I got out of the country with my new 10-day * visa,another 160 Yuan,went to Ulaanbator,Mongolia,with my marriage certificate,and then re-entered fizzing.Since then,I've set out to get my own back by teaching with L's inside and outside NMG territory.Great,no medicals,no RP's and you can do a bunk without fear of retribution if you think you've been mistreated by your employer,not that I've ever had to do it,mind you.But it's an option.Anyone with a Chinese wife who wants to teach in the same manner should contact small-time recruiters.There are always schools and colleges in a fix because they are one short due to louwai not arriving.And it would take too long for them to go through the necessary red tape to get a louwai with a Z visa.Some such employers will employ FT's on long L's with Chinese wives at once.I've been teaching here for 10 years in said way!