On June 22, Hunan TV's "First Release" focused on the largest-diameter subsea high-speed rail tunnel boring machines "Dinghai" and "Yongzhou," jointly developed by CRCC Heavy Industry,China Railway 11th Bureau Group, and China Railway 14th Bureau Group, devoting a 17-minute-30-second feature to how the TBMs are "boring" their way forward to challenge five world records and support the construction of the world's longest and largest-diameter high-speed rail subsea tunnel — the Jintang Subsea Tunnel on the Ningbo-Zhoushan Railway.