Hongkou National Natural Reserve is located in the northern part of Dujiangyan City. The protected area is densely forested with tall and steep mountains, clear streams and waterfalls, and numerous treasured animals and plants, including giant pandas. The rafting here is very famous. Every summer, it is a good place for the citizens to escape from the heat and drift. The locals also like to play mahjong in the green mountains and green waters here. It is very pleasant.