Bus route: Metro Line 9 → Metro Line 4 → Metro 13, with a total length of about 22.2 kilometers.

1. Take Metro Line 9 from Beijing West Railway Station, pass 4 stops and arrive at National Library Station.

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

3. Walk about 420 meters, and then transfer to the subway 13 line.

4. Take the subway 13 line, pass five stops and arrive at Xierqi Station.