1. Walk about 130m from Capital International Airport to Terminal 2.
2. Take the airport special line, pass 2 stops and arrive at Dongzhimen Station.
3. Walk about 40 meters to Dongzhimen Station.
4. Take Metro Line 2 and arrive at Xizhimen Station after 5 stops (or take Metro Line 2 or subway 13).
5. Take Metro Line 4, pass 2 stops, and arrive at Baidu Map of National Library Station.