What are the requirements of concrete inspectors and testers?

The inspector is a national unified examination, and the inspector is a certificate issued by the local labor service! The inspector certificate is actually an upgraded version of the inspector certificate. Now the tester's card is useless. You don't have to take the exam. You pay, and the school will give it to you after the students graduate. The inspector's certificate can only be obtained by oneself, and it is also very useful in society. The inspector's certificate is an employment certificate, which does not represent your strength. On the contrary, the inspector's certificate depends on strength.