Core Viewpoint - The South Mountain Ring Road Phase III has officially opened for trial operation, enhancing the transportation network in the Yanqing District and promoting tourism and economic development in the region [1][2]. Group 1: Project Overview - The South Mountain Ring Road Phase III began construction in March 2023 and was completed two months ahead of schedule, with a total length of 19.8 kilometers [1]. - The project includes 19 bridges and 2 tunnels, connecting key areas such as Dayushui, Jingzhuang, and Yongning [1]. Group 2: Economic and Social Impact - The completion of this road further improves the road network structure in southern Yanqing, facilitating the development of tourism across the district and enhancing emergency response capabilities in mountainous areas [1][2]. - The road serves as a crucial link in the "three horizontal and five vertical" highway network of Yanqing, connecting popular tourist destinations like the Badaling Great Wall and Yongning Ancient City [2].