Construction work completed on Qingdao Metro Line 4, China May 18, 2022 | Asia Pacific News, News Construction work has been completed on Qingdao Metro Line 4. The line will span 31 km from People’s Hall in the west to Laoshan Scenic Resort in the east and will cover 25 stations, including 12 inte... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password