Introduction to the source of Xiangshui Lake: The source of Xiangshui Lake has springs gushing like water and water sounding like thunder. The sound of running water can be heard thousands of meters away, hence its name. This spring is the largest spring in Huairou. It is a drinking water source for nearby people and one of the sources of Huairou Reservoir. It produces 0.3 cubic meters of water per second and has a daily flow of 25,937 tons. The water quality is sweet, refreshing and delicious.