The words of subsidiaries can't just look at the quality of a certain bureau, because some bureaus may rank high, but it is not impossible for one of their branches to rank at the bottom of the whole head office, so it is of practical significance to look at the quality of the three-level number company under construction.
Basically, the following companies are the top three numbered companies in China Construction: China Construction No.1 Bureau, China Construction No.3 Bureau, China Construction No.3 Bureau, China Construction No.5 Bureau Civil Engineering Company, China Construction No.7 Bureau No.3 Company, China Construction No.3 Bureau No.2 Company, China Construction No.4 Bureau No.6 Company, China Construction No.8 Bureau General Contracting Company, China Construction No.2 Bureau No.3 Company and China Construction No.8 Bureau No.3 Company.