The Mintai Tunnel of the Yongren-Guangtong section of the Chengdu-Kunming Railway Capacity Expansion Project was successfully completed on July 24. At this point, all the tunnels in the Yunnan section of the Chengdu-Kunming Railway Capacity Expansion Project have been fully integrated, laying a solid foundation for the opening of the Yunnan section of the Chengdu-Kunming Railway Capacity Expansion Project in 2019.