Introduction to Longjing: Longjing is located on the hillside between Longkang Village and Longqian Cave, surrounded by cliffs and a deep pool in the middle, with a diameter of more than ten meters. The water in the pond does not surge in summer and does not decrease in winter. The water quality is pure and the taste is sweet and fine. After ten years and eight years, there was no wind or rain. The well overflowed and the water surface rolled like a dragon. After a few days, it became calm again, so it was called Longjing.