Passenger services begin on Hefei Metro Line 8, China December 26, 2024 | Asia Pacific News Passenger services have commenced on Line 8 of Hefei Metro. Line 8 spans 22.5 km and covers 12 stations (all underground). This is the first fully autonomous Grade-of-Automation 4 (GoA4) metro line in... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password