The official seal of an enterprise is the private seal of the legal representative of the enterprise. Private seals can be engraved anytime and anywhere, without any regulations. The letterhead stamp and account stamp have no legal effect, and can also be engraved anywhere.
After the official seal is engraved, handle the legal person code certificate and tax registration certificate.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.