There are two ways of foreign patent application enters into China, one is via PCT application, and another is via Paris Convention. The guidance of filing a PCT application in China please reference www.borsamip.cn/En/serviceshow_i.aspx
What shall be submitted when filing the application?
1. Power of attorney with the original signature of the applicant;
2. Specification with claims and abstract;
3. Drawings, if any (two sets of formal drawings);
4. Certified priority document(If Any);
5. Assignment. Where the applicant as indicated in the priority document is not the same as the one that for the Chinese application, an assignment duly executed by the original applicant is required and shall be submitted within three months of the date of filing in China.
When can I get the certificate or how long it would be granted?
The time frame is the same with PCT application, the time frames of being issued are as follow if everything went on smoothly:
Procedure of applying for a patent in China