1, Level 4 certificate can still be used as long as it has the name change certificate issued by the police station where the household registration is located, and there is no need to change its name; Under normal circumstances, the CET-4 certificate is only used in job hunting, and it is rarely used at ordinary times; When you arrive at the company, you may use it when evaluating the title.

2. The certificate of Grade II constructor must be replaced with a new name, and then re-registered in the enterprise before engaging in related work.