The steps and key points for filling in the patent application amendment form are: 1. The form should be filled in in Chinese, the handwriting should be black, the text should be typed or printed, and submitted in duplicate. 2. The content filled in column ① of the table should be consistent with the content in the patent request. If the application has gone through the procedures for changing the recorded items, it should be filled in according to the content after the change is approved by the Patent Office. 3. The applicant filled in column ① of the table should be the first applicant. 4. The squares in column ② of the form are for the person who fills in the form to choose, and they should be marked in the squares. 5. An applicant for an invention patent may voluntarily propose amendments to the patent application within three months from the date of filing a request for substantive examination or the date when the Patent Office issues a “notification of entering the substantive examination stage”. Applicants for utility model or design patents may voluntarily propose amendments to the patent application within two months from the filing date. 6. For modifications to the description or claims of an invention or utility model patent application, except for modifications or additions or deletions of individual words, replacement pages must be submitted in accordance with the prescribed format. For an invention patent application involving nucleotide or amino acid sequences, if the sequence listing is modified voluntarily or at the request of the examiner, a paper replacement page and a CD or floppy disk consistent with the contents of the replacement page should be submitted. For modifications to pictures or photos in a design patent application, replacement pages must be submitted in accordance with regulations. 7. In column ⑤ of the table, if a patent agency is entrusted, the patent agency shall affix its official seal. If a patent agency is not entrusted, the applicant should be signed or stamped by the individual. If the applicant is an organization, the official seal of the organization should be stamped. If there are multiple applicants, the first applicant should sign and seal. If the representative is not the first The applicant shall be signed and sealed by the representative specified in the request.