Writing form:
An independent claim of an invention or utility model shall include a preamble part and a characteristic part, and shall be written in accordance with the following provisions:
(1) Preface: indicate the title of the technical scheme of the invention or utility model to be protected and the necessary technical features of the theme of the invention or utility model which is closest to the existing technology;
(2) Characteristic part: Use "characterized by" or similar words to indicate the technical characteristics of the invention or utility model that are different from the nearest prior art.. These features, together with the features mentioned in the preface, define the scope of the invention or utility model.
A dependent claim of an invention or utility model shall include a quoting part and a defining part, and shall be written in accordance with the following provisions:
(1) citation part: indicate the number of the cited claim and its subject name;
(2) Limited part: specify the additional technical features of the invention or utility model.