On June 20th, the reporter visited the world-class cross sea cluster project - the Shenzhen China Channel. The Shenzhong Passage is a core transportation hub project in the Guangdong Hong Kong Macao Greater Bay Area. The project integrates bridges, islands, tunnels, and underwater interchanges, with a total length of about 24 kilometers. It is currently one of the most difficult cross sea cluster projects in the world for comprehensive construction. At present, the Shenzhen Zhongshan Channel has passed the handover acceptance. (Lai Xin She)