Introduction to Longjing: Daanyuan "Longjing" Waterfall is located at Baihekeng at the foot of Huanggang Mountain. This waterfall flows down from a height of 20 meters to a stone. The stone is like the mouth of a vase. The water passes through the stone, splashing jade and flying flowers. It looks like a flying dragon, so it is known as the "dragon piercing the stone" and has many magical legends.