It's a tax registration certificate. There used to be a national tax and a national tax. Now in many places, the two certificates are combined, that is, two chapters (national tax and local tax) on a tax registration certificate prove that you are registered in the tax.

According to the regulations, an enterprise shall complete the tax registration in the local tax bureau within 1 month after the industrial and commercial registration and obtain the tax registration certificate. Then the enterprise, as an independent legal person, goes to the tax bureau to declare and pay taxes.