Introduction to Longmen Lake: Longmen Lake covers an area of ​​40,000 square meters and can hold 700,000 cubic meters of water. It is composed of natural rainfall water, ice and snow melt water, mountain top Tianchi water, alpine waterfall water, mountain sacred spring water, mountain It is a collection of seven water sources including Dilongtan water and valley stream water. It is a good place for boating and yacht surfing on Pinghu Lake.