The ground-breaking ceremony of the underground main pipeline project of the 100,000 tons/year ethylene-vyl acetate copolymer project (hereinafter referred to as the "EVA project") of Ningxia Coal Industry Company marked the official start of the construction the EVA project. The 100,000 tons/year EVA project is a key construction project in the "14th Five-Year Plan of the State Energy Group and a key project in the "14th Five-Year Plan" of Ningxia Coal Industry Company for the extension, supplement and strengthening of coal chemical industry chain. The project is located in the Coal Chemical Industry Park of Ningdong Energy and Chemical Base, covering an area of about 11 hectares. project uses the surplus ethylene and public utilities such as water, electricity, steam and air from the second olefins company to produce EVA products covering various fields as photovoltaic film, cable material, foaming shoe material, hot melt adhesive and agricultural film. After the project is put into production, it can achieve the and high-end of polyethylene products and promote the deep development of the polyolefin industry of Ningxia Coal Industry Company. The project is managed by the Coal-toil and Chemical Command, which closely cooperates with the Infrastructure Company, the Energy Engineering Company Supervision Company and other units to complete the construction of the project. This main pipeline project involves the construction of multiple systems, including the fire water system, the circulating water system, the rainwater system, etc., and the project is scheduled be completed by the end of May 2025. He Xuewen, Deputy Manager of the EVA Project Department of the Coal-to-Oil and Command, introduced that the project has entered the substantive construction stage, with a pipeline construction length of nearly 3,500 meters and a maximum pipeline diameter of1.2 meters. Faced with the difficulties of winter construction, the project department has arranged to increase manpower and mechanical equipment, reverse the construction period, and ensure the node objectives are achieved on time.