What certificate is useful for working in the laboratory of commercial concrete station? What does it take to be a lab director? Is the Shanghai Stock Exchange useful for commercial concrete stations? thank you In the initial training, it is best to have an experimenter certificate (one of the eight members). There is no rigid requirement for the commercial concrete station, just move a machine to try it and make a ratio. Want to be the director of the office, 1, it matters. It doesn't matter if something comes. If you drive everyone else away, you will be in the upper position. The documents on the building are useful to you. Commercial concrete stations are basically private or joint-stock companies, and their qualifications should be linked to the requirements of technical leaders above engineers. You can see at a glance the qualifications of the personnel reported by your company to Party A (excluding the legal representative).