China’s largest shield tunnelling machine built for high-speed rail has successfully carved a path beneath the Yangtze River, a milestone expected to help strengthen the country’s hi-tech manufacturing supply chains and advanced research capacity.The Chongtai Yangtze River Tunnel, scheduled for completion by the end of this year, will connect Shanghai’s Chongming Island with Taicang in neighbouring Jiangsu province. For the first time, the project will bring high-speed rail services to the...