The Chongqing-Kunming High-Speed Railway Sichuan-Yunnan section has completed the construction of all 28 tunnels along the line.

Today, the last tunnel of the Chongqing-Kunming high-speed rail Chuandian section, the Yibin Yunlian Tunnel, was successfully completed, marking the completion of all 28 tunnels on the Chuandian section of the Yunkun high-speed rail. The project construction has entered a new stage.