Bus route: Daxing Line of Metro Line 4 → Metro Line 2 → Express 955, the whole journey is about 32.3 kilometers.

1. Take Daxing Line of Metro Line 4 from the National Library, pass 2 stops and arrive at Xizhimen Station.

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

3. Walk about 440 meters and arrive at Dongzhimenwai Station.

4. Take the 955 express, pass two stops, and arrive at the airport.

5. Walk about 990 meters to the Aviation Administration of Capital Airport.