Bus route: Daxing Line of Metro Line 4 → Metro Line 7 → Te87 Road, with a total length of about 20.6 kilometers.

1. Take Daxing Line of Metro Line 4 from the National Library and arrive in caishikou station after 9 stops.

2. Walk about 50 meters and transfer to Metro Line 7.

3. Take Metro Line 7, pass 7 stops and arrive at Jiulongshan Station.

4. Walk about 320 meters to the Pearl River Dijing Station.

5. Take bus No.87, pass 2 stops and arrive at Beijing East Railway Station.