The South-to-North Water Diversion Project, with its large span, large flow rate, complex environment, and wide range of applications, is a national strategic project vital to the national economy and people's livelihood. Our company's DN1000mm large-diameter steel-plastic composite pipeline, with its superior water hammer resistance and low fluid resistance, successfully became the first steel-plastic composite pipeline project in the South-to-North Water Diversion Project. Simultaneous pipeline excavation and welding significantly shortened the project cycle and perfectly solved the problem of safe water transmission over large flow, long spans, and high pressures, contributing significantly to the eastern route of the South-to-North Water Diversion Project. This demonstrates the company's service capabilities for large-diameter, long-span national engineering projects using steel-plastic composite pipelines.