On January 16, the Hangzhou Bay Cross-Sea Railway Bridge marked a major milestone as its first main tower was successfully topped out. Stretching 29.2 kilometers and designed for speeds of up to 350 km/h, it is the world's longest high-speed railway cross-sea bridge currently under construction. Once completed in 2027, the mega-project will significantly enhance connectivity and support high-quality, integrated development in China's Yangtze River Delta.