On the afternoon of 1, China Railway Fourth Bureau signed a strategic cooperation agreement with China Railway Engineering Equipment Corporation. Wang Chuanlin, general manager of China Railway Fourth Bureau, and Tan Shunhui, general manager of China Railway Engineering Equipment Company, respectively signed the agreement on behalf of both parties. Yuan Min, Deputy Secretary of the Party Committee and Secretary of the Discipline Inspection Commission of China Railway Fourth Bureau, Zhang, Deputy General Manager, Bu, Deputy Secretary of the Party Committee and Secretary of the Discipline Inspection Commission of China Railway Engineering Equipment and Chairman of the Labor Union, and Deputy General Manager attended the signing ceremony. The purpose of signing the strategic cooperation agreement is to promote the cooperation between the two sides in the fields of railway, highway, municipal administration, water conservancy, urban rail transit, common pipe gallery, smart city and other tunnels and underground space development. , form the normal interaction of market development, technical exchange, equipment guarantee, capital operation and other businesses, and establish a strategic alliance for cooperation in tunnel and underground space development. The cooperation includes: jointly developing the application market of large-scale shield 1TBM (full-face tunnel boring machine), working together on the application of complete sets of mechanized equipment for drilling and blasting tunnel construction, jointly investing in the development of underground space market, and carrying out technical support and regular technical exchanges with each other.