China Construction Fourth Bureau is a central enterprise. China Construction Fourth Engineering Bureau Co., Ltd. official website inquired that China Construction Fourth Engineering Bureau Co., Ltd. (hereinafter referred to as China Construction Fourth Engineering Bureau) is a subsidiary of China State Construction Engineering Corporation, which is a central enterprise, so the Fourth Engineering Bureau is also a central enterprise. China Construction Fourth Engineering Bureau Co., Ltd. (hereinafter referred to as "China Construction Fourth Engineering Bureau") was established in 1962. It is the backbone subsidiary of China State Construction Engineering Corporation, the only major large-scale company of China Construction Group headquartered in Guangzhou, and a large-scale comprehensive investment and construction group of the central government in Guangdong. The company currently has more than 30,000 employees. In addition to its headquarters in Tianhe District, Guangzhou, eight of its 14 main production units are located in Guangdong, with more than10,000 employees.