If you submit by paper and there is no agency, go to the State Intellectual Property Office website to download the supplement form, fill in the basic information according to the instructions, check the second box in the attachment list, and write, " Replacement pages of instructions and drawings, one copy, each page?",? Fill it in according to the number of pages you have, and finally sign the same seal or word as when you applied at the signature place.
Send the amendment and replacement instructions and drawings to the Patent Office Reception Office.