If you are married to a Chinese citizen all you get is an L visa {tourist visa} valid for 1 or maybe 2 years now. Your not entitled to work or teach and I would check the number of entries you get with it too. If you want to work you must get a Z visa then you have 30 days to have a medical at a designated center be issued with a heath certificate and apply for your Foreign Expert Certificate [F.E.C that only last the length of your contract]. With this little blue book you can get a 6 month residence permit. Your employer or school have to renew this for you, just because you are married does not give you the right to work in China only to get an extended tourist visa. Of course should you leave your job then after 1 month you can go to the PSB and they will give you your 1 or 2 year L visa. Should you then find work it's back to the Z visa and then the F.E.C and away you go again. Interestingly If you have your F.E.C then this acts as a Chinese passport so you don't have to carry your real one about, it gives you extra allowances at customs and it's multiple entry among other things. I recently came back into the country with mine and got a very courteous welcome from the customs officials.