If you are working in China, and want to fire your employer but still do the same job, the following docs will be asked by your next employer to get a new work permit for you:
- Demission certificate from your former employer : to show you have resigned aready;
- Work Experience Certificate from any one of your former employer, to show you have 2 years working experience which similar with the job you will do;
- The Cancellation of your former work permit;
- Your degree ( should be legalized) ;
How to notarize your degree for China z visa
- You CV;
- A ID Photo with white background;
- Your passport ( more than one year validity).
http://www.startupbusinesschina.com/the-costs-of-set-up-a-company-in-china/