After the Spring Festival holiday, construction projects such as the Xuantianhu Bridge and Liusanzhai Tunnel on the Chengdu Chongqing Middle Line high-speed railway, undertaken by China Railway Fifth Bureau, have resumed work and production one after another, and the overall construction is progressing in an orderly manner. The Chengdu Chongqing High speed Railway is an important component of China's "Eight Verticals and Eight Horizontals" high-speed railway network along the Yangtze River. After completion, it will further shorten the travel time between Chengdu and Chongqing, which is of great significance for supporting the construction of the Chengdu Chongqing dual city economic circle. (Lai Xin She)