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