Attached drawings of patent specification

Designs are ok, but inventions and utility models are not. The relevant provisions in the review guide are attached as follows:

Designs: the applicant shall submit relevant views (pictures or photographs) on the contents required to be protected for each design product, as long as the objects required to be protected can be clearly displayed;

utility model: engineering blueprints and photos are not allowed in the attached drawings;

invention: in general, photos should not be used as drawings, but in special cases, for example, when showing metallographic structure or tissue cells, photos can be used to be attached to drawings as drawings.