Official seal, corporate private seal, company financial seal, invoice special seal.

According to the "seal engraving industry security management measures" (hereinafter referred to as "measures") Article XVII (the engraving of the official seal) provides that: "units or individual businesses need to engrave the official seal, should be issued by the competent departments of the certificate or business license issued by the administration for industry and commerce, to the public security department to apply. To the public security department to apply for approval by the public security department, after the approval of the official seal engraving certificate issued within the prescribed period to the official seal engraving business unit engraving. The approval of the public security department for the engraving of the official seal, the implementation of the city and district, specific management at two levels, the specific measures by the Municipal Public Security Bureau separately." Or according to the "measures" Article 19 (the replacement of the official seal) provides: "units or individual business households need to replace the official seal, should be licensed to the public security department to return the original official seal, and according to the provisions of the first paragraph of Article 17 of the present measures, to re-apply for the formalities of engraving the official seal."