Passenger services commence on Hefei Rail Transit Line 4 South extension, China May 2, 2024 | Asia Pacific News, News Passenger services have commenced on Line 4 South Extension of the Hefei Rail Transit (also known as Hefei Metro) network. The extension spans 13.62 km (6.6 km underground, 6.75 km elevated, and 0.27 ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password