Bus route: Airport Line → Metro Line 2 → Metro Line 4 Daxing Line, with a total length of about 41.8km..

1. Walk about 280m from Beijing Capital International Airport and arrive at T3 Terminal Station.

2. Take the airport line, pass three stops and arrive at Dongzhimen Station.

3. Walk about 5 10 meters to Dongzhimen Station.

4. Take Metro Line 2, pass 5 stops and arrive at Xizhimen Station.

5. Take Daxing Line of Metro Line 4, pass 2 stops and arrive at National Library Station.