The world's largest-diameter shield machine for constructing high-speed railway tunnels, independently developed by China, marks its 10,000-meter tunneling milestone under the Yangtze River on Dec 16, 2025. With only 1,000 meters remaining to the southern bank of the Yangtze, the boring operation is expected to conclude in late 2026. [Photo by Gao Erqiang/China Daily]
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