About 19.7 km. Driving from Beijing West Railway Station to anzhen hospital takes about19.7km and takes about 46 minutes. You can also take Metro Line 9 and transfer to Line 4, and transfer to Line 10 in the station, which takes 53 minutes. Take Metro Line 9 from Beijing West Railway Station, transfer to Line 4 at National Library Station after 4 stops, get off at Haidian Huang Zhuang Station after 3 stops, transfer to Line 10 after 7 stops, and walk 900 meters to anzhen hospital.