legal ground
Article 64 of the patent law
The scope of protection of the patent right for invention or utility model shall be subject to the content of the claim, and the description and drawings can be used to illustrate the content of the claim.
The protection scope of the patent right of design shall be subject to the design of the product shown in the picture or photograph, and the brief description can be used to explain the design of the product shown in the picture or photograph.