What is a patent attachment? Please consult the great god. Thank you.

Patent drawings are drawings attached to patent application documents. The attached drawings here, generally referring to the attached drawings of the specification, are mainly used to clearly state the invention or utility model for which the patent is applied, so as to facilitate the understanding of China National Intellectual Property Administration examiners and the general public. Among them, the description of an application for a patent for invention can be supplemented by appended drawings, and the description of an application for a patent for utility model must be supplemented by appended drawings.