China completes main drilling of the world's longest undersea railway tunnel
Today, China completed the main digging works for the longest underground sea tunnel in the world, which is the second underwater tunnel connecting Jiaozhou Bay in Qingdao City, Shandong Province. The total length of the tunnel is 17.48 kilometers, with 9.95 kilometers lying beneath the seabed. It is designed to reach speeds of up to 80 kilometers per hour. The project aims to improve regional transportation by providing a fast and safe alternative to traditional roads, thereby contributing to economic and tourism development in the area. The digging achievement marks a significant step toward completing the engineering works and opening the tunnel, which will enter the Guinness World Records as the longest underwater land tunnel in the world, reinforcing China's position in advanced infrastructure.
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