CRCC begins subsea construction of world’s longest underwater HSR tunnel in China June 11, 2025 | Asia Pacific Company News, Asia Pacific News, Company News, News The China Railway Construction Corporation (CRCC) has commenced subsea excavation to develop the world’s longest underwater tunnel for a high-speed rail (HSR) line in China. The tunnel, known as the J... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password