Take the subway 13, 10, Xijiao and other lines. According to Baidu map, the distance from Huilongguan to the Summer Palace is 22.3 kilometers, and it can be reached by subway 13, 10 and Xijiao Line, which takes 1 hour. The specific route is as follows:

1. Take the subway line 13 from Huilongguan, and arrive at Zhichun Road after 6 stops.

2. Secondly, take the subway 10 line and arrive at Bagou after four stops.

3. Finally, take the subway Xijiao Line, pass 1 station, and you can reach the west gate of the Summer Palace.