1, depending on qualification, general design qualification, contracting qualification and processing qualification; 2. Look at the company's workshop, which is a company's hardware facilities; 3, see the construction performance, whether there is really some mature construction experience; 4. Look at the employees of the company's technical department and their professional strength. Employees represent the real level of a company; 5, look at the company's corporate culture, it's terrible to have no culture these days. The strength effect is definitely not good. I just want to make money, not develop. The engineering quality of such a company is certainly not trustworthy. 6. See what you want to do, whether it is a high-rise building or a factory building. High-rise buildings are well done, but factories are not necessarily well done. It is said that there is specialization in the industry. Finally hope to adopt