Group 1 - The Guangzhou South-North Link Line project has reached a critical milestone with the launch of the "Tianyou" shield tunneling machine, marking the start of the full-scale underground tunneling phase [1] - The project, which is 16.077 kilometers long with a design speed of 200 km/h, includes a key 13.21-kilometer tunnel that faces complex geological conditions [1] - The construction team has implemented innovative technologies such as crawler cranes and drone monitoring to enhance efficiency and safety during the installation of large components [2] Group 2 - The completion of the Guangzhou South-North Link Line is significant for the development of the Guangdong-Hong Kong-Macao Greater Bay Area, improving the regional transportation network [2] - Once operational, the travel time between Guangzhou South Station and Guangzhou Station will be reduced to approximately 15 minutes, facilitating direct access to major cities like Shenzhen, Hong Kong, Zhuhai, and Macau [2]