legal ground
Article 13 of the Trademark Law of People's Republic of China (PRC)
The application for trademark registration shall be filled in according to the published classification table of goods and services. For each application for trademark registration, an application for trademark registration 1 copy and a trademark pattern 1 copy shall be submitted to the Trademark Office; Where an application for trademark registration is made by color combination or colored pattern, the colored pattern shall be submitted, and a 1 black and white manuscript shall be submitted; If no color is specified, a black and white pattern shall be submitted.
Trademark patterns should be clear and easy to stick, printed on bright and durable paper or replaced by photos, and the length and width should be no more than 10 cm and no less than 5 cm.
Where an applicant applies for trademark registration with a three-dimensional mark, it shall make a statement in the application, explain the way of using the trademark, and submit a pattern that can determine the three-dimensional shape. The submitted trademark pattern shall contain at least three views.