Core Viewpoint - The launch of the "Yongqing" large-diameter shield machine marks the commencement of the Guangzhou South Station to Guangzhou Station connection line project, which is crucial for the integration of transportation in the Guangdong-Hong Kong-Macao Greater Bay Area [1][2] Group 1: Project Overview - The Guangzhou South Station connection line is 16 kilometers long with a design speed of 200 kilometers per hour [1] - The project features a challenging construction phase, particularly the Xilang Tunnel, which requires precision in a high-risk environment [1] Group 2: Technological Innovations - The "Yongqing" shield machine is equipped with a high-precision measurement system and smart shield technology, enabling millimeter-level control at a depth of 25 meters [1] - A multi-layer grouting system and a digital command platform are utilized to mitigate construction risks in shallow cover sections [2] Group 3: Impact on Transportation - Upon completion, the connection line will facilitate direct access from Shenzhen and Macau high-speed rail to downtown Guangzhou, creating a seamless "one-hour living circle" [2] - The project is expected to enhance the operational capacity of the Guangzhou railway hub, reinforcing its status as an international transportation hub in the Greater Bay Area [2]