Bus route: 877 → 20: 00 pm → Metro Line 2 → Metro Line 4 Daxing Line, the whole journey is about 65.0 kilometers.

1. Walk about 7 10 meters from Badaling Great Wall and arrive at Badaling Great Wall Station.

2. Take bus No.877, pass 1 station and arrive at Deshengmen Station.

3. Walk about 70 meters and arrive at Deshengmen Station.

4. Take a bus outside at 20: 00 pm, pass 1 station and arrive at Deshengmen West Station.

5. Walk about 270 meters to Jishuitan Station.

6. Take Metro Line 2, pass 1 station and arrive at Xizhimen Station.

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