If you want to take the exam yourself, you can take the national communication professional level exam in September every year, and the junior high school and construction engineer are in the first and second grades;
There are also some budget estimates, cost engineers, consultants and senior communication engineers. There is no end to learning and no end to taking exams. These connections are not very big, but if you can get in, you will increase your personal qualifications by your own capital. However, we can't blindly take the certificate, which will delay the study of work knowledge and work content.