Chinese seal is a kind of negative seal. Yinyin refers to the depression of the characters and patterns on the surface of the seal, and the printed effect is scarlet letters on a white background and white characters on a red background. Positive printing means that the characters and patterns on the surface of the seal are raised, and the printed effect is white characters on a red background and scarlet letters on a white background.

The main pattern of the Chinese seal of the emblem of the Beijing Olympic Games is a red Chinese seal, engraved with the words "Dancing Beijing" and an abstract humanoid pattern. This China seal is made by yin printing, and the printed effect is scarlet letter on a white background.