What should I pay attention to when submitting application documents when applying for a patent?

Matters needing attention in submitting application documents If you apply to the Patent Office for a patent or go through other formalities, you can submit or send the application documents or other documents to the Patent Office, or you can submit or send them to any agency of the Patent Office. The following matters should be noted when submitting documents: (1) When submitting application documents or documents for various formalities to the Patent Office, the format uniformly formulated by China National Intellectual Property Administration should be used. This form can be downloaded from the Internet in www.sipo.gov.cn, or obtained in the reception hall in China National Intellectual Property Administration or by letter (sent to the issuing room of the preliminary examination and process management department of China National Intellectual Property Administration Patent Office). (2) A form can only be used for one patent application. (3) All documents submitted to the Patent Office shall be kept by the applicant, so as to ensure the consistency of document filling in the process of application examination and approval, and can be used as a reference when replying to the examination opinions. (4) If the application documents are sent by post, a registered letter shall be used. If it cannot be sent by registered mail, it can be sent by express mail, and the application documents cannot be sent by parcel. In addition to indicating the detailed address of the Patent Office or its agency (including postal code), the registered letter should also indicate the words "application documents", "China National Intellectual Property Administration Patent Office accepted" or "China National Intellectual Property Administration Patent Office accepted". If the application documents are submitted by the courier company, the date of actual receipt by the Patent Office and its agencies shall be the application date. Registered letters should only contain the same application documents. After mailing, the applicant shall properly keep the registered receipt stub.