The left-line tunnel linking Yuntang Station and Huanbao Avenue Station was holed through on October 10, making it the first section drilled through along the main line of Changsha Metro Line 7 Phase Ⅰ Project. The project starts at Yuntang Station and ends at Wulipai Station, with a total length of 16.84 km. Line 7 will be Changsha's first fully automated metro line. (Photo/Li Jian, Hunan Daily)
The left-line tunnel linking Yuntang Station and Huanbao Avenue Station was holed through on October 10, making it the first section drilled through along the main line of Changsha Metro Line 7 Phase Ⅰ Project. The project starts at Yuntang Station and ends at Wulipai Station, with a total length of 16.84 km. Line 7 will be Changsha's first fully automated metro line. (Photo/Li Jian, Hunan Daily)
来源：enghunan.gov.cn
编辑：谭婕倪