How to pay the annual fee for utility model patents, and what materials should be prepared?

Pay the annual patent fee, first, pay the patent fee directly to the China National Intellectual Property Administration Patent Office or the local patent office agency; The second is to remit patent fees through the post office. When remitting patent fees through the post office, you should fill in the correct application number (or patent number) and fee name (or abbreviation) in the postscript column of the remittance slip. Or find an agent to hand it in for you.