If the company is not on the public list, it must be fake, or you have to go to a regular filing company for lettering.
Extended data
Scope of official seal engraving and filing: legal name seals of Beijing state organs, people's organizations, social organizations, enterprises, institutions, individual industrial and commercial households and other organizations, seals of internal organs and branches with legal names, and special seals for contracts, finance, invoices, authentication and customs declaration with legal names.
Reference materials? Beijing Public Security Bureau-How to inquire whether the official seal engraving is filed with the public security organ?