Introduction to Tanghe Cold Spring: It is 300 meters away from the hot spring. The water is clear to the bottom and gushes out in all seasons, which contrasts with the hot spring. The cold spring is a natural outcrop of the limestone fissure karst aquifer, with a daily inflow of 200 cubic meters. The spring water is of the low-mineralization sodium bicarbonate type, colorless, transparent, odorless, with a water temperature of 15°C, and contains a variety of chemical elements and positive and negative ions. The spring water meanders northward and merges into Tang River. According to the investigation and verification by the scientific department, this cold spring contains lithium, selenium, strontium and other trace elements that are beneficial to human health, and can cure heart disease, anemia and other diseases.