Don't forget to Take away the document before you leave China- Police Clearance Certificate
Issue Police Clearance Certificate is some kind complex if you are not in China and it is widely used in immigration program (Canada, USA, etc.)
I have some student asked me about this issue. He has studied in Zhejiang, China before and now he wants to immigrate to Canada. But the Canada government need his China Police Clearance Certificate to show his behaviour in China. Unlukily, he is not in China anymore, so everything become troublesome. But if he done this paper before he left,then all these problem won't be happen.
Process to get Police Clearance Certificate:
1. Bring your passport and go to the police station where you issue the resident permit and told them the reason to issue this paper they will offer you a certificate in Chinese, like"xx在x年x月x日-x年x月x日期间,无犯罪记录. with stamp
2.Bring this paper to the notary office together with passport and here will cost you some money then they will give you the notarized documents with Chinese and English version and this is what is needed in the embassy.
May be different places, the process may be a bit different, anyway this is the very normal one. Hope it will help you!