Operations start on Line 4 of China’s Changsha Metro May 26, 2019 | Asia Pacific News Operations have started on Line 4 of Changsha Metro. The line spans 33.5 km, covers 25 stations, and connects Guanziling in the northwest to Fubuhe in the south. The line has been developed at a cost ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password