The specific method is: the parties can search the health pavilion in the national enterprise information publicity system to find out whether it is a normal business enterprise, whether it has a business license and whether the business scope meets the corresponding qualifications. Business license is a certificate issued by the administrative department for industry and commerce to industrial and commercial enterprises and individual operators to engage in certain production and business activities. Article 78 of the Civil Code states that a profit-making legal person established according to law shall be issued a business license by the registration authority. The date of issuance of the business license is the date of establishment of the profit-making legal person.