1, China Railway Second Engineering Bureau Group Co., Ltd., formerly known as Southwest Railway Engineering Bureau, was established in June of 1950 and is a core member enterprise of China Railway. With an annual revenue of over 60 billion yuan, China Railway Second Bureau is the largest enterprise of the central government in Sichuan.

2. China Chemical Engineering Group Co., Ltd., founded in 1964, is a large-scale backbone construction enterprise of the central government in Sichuan and a global leader in chemical construction. Over the past 50 years, the company has undertaken more than 600 chemical and municipal projects in China, and built the first chemical fertilizer plant, the first polyformaldehyde plant and the first high-purity polysilicon plant in China.

3. China 19th Metallurgical Group Co., Ltd., established in June 1966, is affiliated to China Wuche Group, mainly engaged in construction engineering, equipment manufacturing and real estate development. The company was originally headquartered in Panzhihua, and now it is headquartered in Chengdu. This is a large-scale construction enterprise of the central government in Sichuan and a national high-tech enterprise in Beijing. He has edited and participated in 12 national, industrial and local standards. The company has successively participated in the construction of key metallurgical projects at home and abroad represented by Panzhihua Iron and Steel Company, Wuhan Iron and Steel Company, Baosteel and Formosa Plastics Vietnam Hejing Iron and Steel Plant. And key construction projects represented by Chengdu-Chongqing Expressway and Beijing-Zhuhai Expressway.