If you have a Permanent Residence Certificate for Aliens, you may reside in China for unlimited period of time, are not subject to any visa requirement when entering and exiting China, and can enter or exit China with your valid passport and the Permanent Residence Certificate for Aliens. The Permanent Residence Certificate for Aliens is your certificate of identity when you are residing in China. The Permanent Residence Certificate for Aliens is valid for 5 in the case of minors and 10 years in the case of adults.