Metro Line 4 →355 takes about 50 minutes /20.7 kilometers. Take Metro Line 4 15 at Beijing South Railway Station, get off at Zhongguancun Station (C2 exit) for 50 meters, walk to Zhongguancun South Railway Station No.4 and take No.355 (or No.466), and get off at the west exit of Tsinghua East Road and walk to Tsinghua University for 300 meters.