The style of the official seal is standardized by the state.

the official seal of state-owned enterprises is a circular stamp with a diameter of 42MM, and the official seals of other companies and enterprises are a circular stamp with a diameter of 41MM. The width of the round edge of the official seal is 1 mm.

the official seal shall be made and used in accordance with the regulations on the management of seals of state administrative organs, enterprises and institutions and social organizations. The financial seal, invoice seal and contract seal shall be formulated by the relevant government departments.

the company department seal belongs to the internal special seal and cannot be used for external business. The official seal of the department is generally managed with reference to the official seal.

the special seal for a department cannot be a circle, but it is generally an oval stamp, with the aspect ratio of 4:3 or 3:2, the width of the circle is 1MM, and the middle is a five-pointed star (foreign companies and joint ventures cannot be a five-pointed star, but they can use the company LOGO). The upper part of the five-pointed star surrounds the full name of the company from left to right, and the lower part of the five-pointed star horizontally writes the name of the department. All fonts on the official seal must be in Song typeface. The font size can be adjusted according to the number of words in the company name. A foreign-capital enterprise may attach its foreign language logo to Chinese.