On Aug 21, the world's first ultra-high-pressure tunnel through the Yangtze River, built by CRCC, was holing-through. The Su-tong GIL Utility Tunnel Project located in Changshu City, Jiangsu Province is the first time in the world to use a large-diameter shield tunnel in the power pipe corridor project. It is also the highest voltage level, the largest transport capacity and the most advanced technical level ultra-long-distance GIL innovation project in the world. The project has created many records of the world in the history of power engineering construction and tunnel shield construction.