The integration of three certificates refers to business license, organization code certificate and tax registration certificate. "Three certificates in one" is to combine business license, organization code certificate and tax registration certificate into one business license.

These three certificates are:

1. Business license is a certificate issued by the administrative department for industry and commerce to allow industrial and commercial enterprises and individual operators to engage in certain production and business activities. Its format shall be uniformly stipulated by the State Administration for Industry and Commerce.

2. The organization code certificate is a passport for all kinds of organizations in social and economic activities. Code is the abbreviation of "Organization Code". Organization code is a unique and unchangeable code identification issued to legally registered organs, enterprises, institutions, social organizations and private non-enterprise units nationwide.

3. The tax registration certificate refers to the registration certificate issued by a taxpayer engaged in production or business operations when applying for tax registration to the competent tax authorities in the place where the production or business operations or tax obligations occur. Taxpayers must hold tax registration certificates when opening bank accounts, applying for tax reduction, exemption, tax refund and other matters, except those that do not need to issue tax registration certificates according to regulations. Taxpayers shall publicly hang the original tax registration certificate in their production, business operation or office places and accept the inspection by the tax authorities.