Concrete

The Lingdingyang Bridge and the western artificial island of the Shenzhen-Zhongshan Link complex in Guangdong province. CHEN JIMIN/CHINA NEWS SERVICE The main line of the Shenzhen-Zhongshan Link, a mega cross-sea passage in the Guangdong-Hong Kong-Macao Greater Bay Area, has been fully connected after completion of the last part of the caisson concrete pouring on Tuesday morning. The project, which integrates a bridge, island, tunnel and underwater interchange, starts from the Shenzhen airport interchange, crossing the Pearl River estuary to connect with Ma'anshan Island in Zhongshan. It is the world's most comprehensive and difficult cross-sea cluster project, consisting of 24 kilometers of an eight-lane expressway with a traffic speed of 100 km per hour. With completion of the link, the comprehensive transportation convenience of the GBA and the traffic capacity of the river crossing channel will be greatly improved, according to Deng Xiaohua, Party chief of Guangdong Transportation Group. "After its opening to traffic next year, the Shenzhen-Zhongshan Link will help build a balanced and coordinated high-speed transportation network in the Pearl River estuary, along with other cross-sea and cross-river channels," said Deng. A worker introduces the inner structure of the undersea tunnel section of the complex on Tuesday. CHEN JIMIN/CHINA…