To apply for an electronic official seal, which is also an engraving, you must apply to the public security department with a certificate issued by the competent department or a business license issued by the industrial and commercial administration department. Article 17 of the "Measures for the Administration of Public Security of the Seal Engraving Industry" (Engraving of Official Seal):

If an unit or individual industrial and commercial household needs to engrave an official seal, it shall provide a certificate issued by the competent department or the industrial and commercial administrative department. To apply for the issued business license to the public security department, after approval by the public security department, an official seal engraving certificate will be issued, and the official seal engraving certificate must be engraved at the unit that operates the official seal engraving business within the specified period. Extended information

Official seal Since the Ministry of Public Security does not have unified regulations on the procedures for engraving seals, public security agencies in various places have different regulations on the procedures for engraving seals. The procedures vary depending on the type of seal being carved.

The use of the official seal of any unit must strictly comply with the leadership approval system. That is to say, every use of the official seal of the unit must be approved by the legal representative of the unit. If the legal representative of the unit is out of town or unable to approve the use due to other important tasks, the use must also be approved by an appropriate person such as a deputy authorized by the legal representative of the unit.

Baidu Encyclopedia-Engraved Seal