Article 26, paragraph 3, of the Patent Law of the People's Republic of China stipulates: The specification shall give a clear and complete description of the invention or utility model, and shall be prepared in a manner that a skilled person in the relevant technical field shall It shall prevail if it can be realized; if necessary, there should be attached drawings. The abstract should briefly describe or the technical key points of the utility model. This provision explains that when applying for an invention or utility model patent, when preparing a description, in order to accurately express the content of the description, when necessary, there should be provisions for drawings. If there are drawings in the description, they should be produced according to the following requirements: 1. Several drawings of the invention or utility model can be drawn on one drawing, and the serial numbers of Figure 1, Figure 2... are accurately marked; 2. , the size and clarity of the drawings. If the picture is reduced to two-thirds of the size of the original picture, it can ensure that each detail in the picture can be clearly distinguished; 3. Attached pictures are not allowed. Any reference signs that are not mentioned in the description of the invention or utility model shall not appear in the drawings, and the reference signs that do not appear in the drawings shall not be mentioned in the text part of the description; 4. The same component is represented in the application documents The reference signs of the drawings should be consistent; 5. Except for necessary words, the drawings should not contain other annotations.