Recently, the main tower of the south navigation channel bridge of the Hangzhou Bay Sea-Crossing Railway Bridge — the world's longest high-speed railway sea-crossing bridge under construction, built by CCCC was successfully topped out. As the key control project of the entire Nantong–Suzhou–Jiaxing–Ningbo High-Speed Railway line, the two 157.5-meter-high diamond-shaped main towers now stand proudly in the middle of Hangzhou Bay.

The main pier construction faced a 25-meter internal-external water head difference and challenges from strong tides and swift currents, setting a new domestic record for similar projects. The construction team deployed the "ErhangZhuoyue," the country's largest double-boom luffing crane vessel, and pioneered a buoyancy-assisted rapid lowering method, equipping the giant steel cofferdam with a "floating device" to secure a sturdy foundation base.

To tackle the unpredictable weather and hydrological conditions of Hangzhou Bay, CCCCers used digital technology as the "smart brain." During peak construction, over 30 vessels operated simultaneously at sea. The team established a smart bridge command center and developed a custom intelligent temperature control system for the tower, enabling "smart" monitoring and enhanced efficiency throughout the process.

Upon completion, the bridge will enable "1-hour connectivity" between Ningbo and Shanghai or Suzhou, and bring Jiaxing, Ningbo, and Suzhou into a "half-hour commuting circle." It will fully unlock the interconnection potential across Hangzhou Bay and inject new vitality into the integrated development of the Yangtze River Delta region.