It is equivalent to setting up a subsidiary or an independent main company by a company with construction qualifications, and then separating the qualifications. After the separation of qualifications is completed, the newly established subsidiary or main company and the parent company change companies, and the qualifications are stripped after the change is completed. The stripped building qualification belongs to the newly established subsidiary or main company, and then the company and qualification legal person are changed. In this way, a completely new construction company and construction qualification were stripped off.