From 20 16 12 1, Qingdao has fully implemented the registration mode of "two certificates in one" for individual industrial and commercial households. Through the "integration of two certificates", individual industrial and commercial households have realized that citizens can apply for industrial and commercial and tax registration of individual industrial and commercial households only by filling out "one form" and submitting "one set of materials" to "one window", which makes the access procedures of individual industrial and commercial households simpler, fewer links and shorter time limit. After the reform, the time limit for handling the "two certificates" was shortened to 3 working days.

The combination of two certificates for individual industrial and commercial households is to combine the business license and tax registration certificate into one and become a unified social credit code business license.