The official seal refers to the seal used by organs, organizations, enterprises and institutions. Because the Ministry of Public Security has not made uniform provisions on the engraving procedure, the provisions on the engraving procedure vary from place to place. According to the different types of seals, the procedures are different.

The official seal of a limited liability company has no organization code. The number of other official seals represents the organization code of the unit, that is, the household registration code of the unit.