2. Websites of relevant industry associations or regulatory agencies: The qualifications of different industries can be inquired through the official websites of relevant industry associations or regulatory agencies. These websites usually provide online inquiry or consultation services, and you can inquire according to your own industry.
3. Consult professional service organizations: If you specifically want to verify whether an enterprise has special, first-class and second-class qualifications, you can consult relevant professional service organizations, such as quality certification bodies and engineering consulting companies, and they will generally provide corresponding qualification verification services.