1. First walk in the National Library 10 meters, and get on the Daxing Line of Metro Line 4 at the National Library Station.
2. Secondly, take 2 stops to Xizhimen Station, then change to walk 420 meters to 13 line.
3. Finally, take 5 stops to Qinghe Station, get off and walk 10 meters to Qinghe Station. The National Library is 5.4 kilometers away from Qinghe Station/KLOC-0, and it takes 34 minutes by subway.