First of all, determine whether your current occupation and work are related to laboratory work; Secondly, you are really self-motivated, eager to learn, and willing to engage in technology, which is the premise of doing this job well. However, this line pays attention to experience, so the problem with your work permit is:

1, although your junior high school education is really low, I think you can learn it;

2. The certificate of the concrete tester is generally a certificate issued by the local concrete quality supervision department and association, which generally trains some basic concrete knowledge and conducts simple test operation assessment. If you study hard, it's not very difficult, and I don't know where you are. The training and examination difficulties and requirements for testers are different.

In short, as long as you work hard, there will be no problem.