according to China's patent law, the period of validity of invention patents is 2 years, that of utility model patents and appearance patents is 1 years, and the starting date of the fixed number of years is the patent application date.
that is to say, if the patentee pays the annual fee on time every year, the invention patent can be held for 2 years and the utility model and appearance can be held for 1 years.
I hope I can help.