Bus route: Metro Line 4 Daxing Line → Metro1East Section of Line 4 → 139 Road, with a total length of about 20.0 kilometers.

1. Take Daxing Line of Metro Line 4 from the National Library, pass 1 1 station and arrive at Beijing South Railway Station.

2. Take the east section of subway 14 line, pass 4 stops and arrive at Fangzhuang Station.

3. Walk about 230 meters and arrive at Zuo 'anmen Station.

4. Take bus 139, and arrive at longtan lake Swimming Pool Station after two stops (you can also take bus 684 or 12).

5. Walk about 30 meters to longtan lake Park.