Extension of Visa
Foreigners who want to stay in China beyond what their current visas allow need to apply for an extension to their visa with appropriate reasons.
The extension application should be made at the municipal public security bureau 7 days before the visa expires. Multiple visas cannot be extended.
Foreigners who wish to apply for extension or alteration of visas or certificates need to provide the relevant documents:
1) A valid passport and visa as well as the documents regarding accommodation registration
2) A fully completed application form for extension or alternation
3) Documents and papers supporting reasons for extension or alternation

The duration of visa extension:
1) F Visa: the total extensions add up to no more than 1 year and each extension should be less than 3 months
2) L Visa: The L visa held by visitors could be extended once with the duration no more than 1 month; L visa held by family visitors could be extended three times with each duration under 3 months
3) C Visa: C visa only could be extended once with the total duration less than 7 days
Foreigners who are disallowed to extend:
1) Foreigners whose duration of stay is shortened and those whose residence right are deprived
2) Individual travelers who have no sufficient traveling expenses
3) Family visitors who has no special reason for extension when their visa expires