The annual patent fee can be paid annually, or it can be paid in one lump sum and divided into several years. Paying the annual patent fee for many years in one lump sum can also make the patentee worry more about losing the patent right because of renewal. At present, China's invention patents are valid for 20 years, utility model patents are valid for 10 years, and design patents are valid for 15 years. You can choose to pay multi-year fees according to your own situation.