Huitang, in English it means "grey soup", is nominated from the vapour rising out the spring. Huirang Hotspring in Ningxiang County has a history of 2000 years. The water is transparent and clear, maintaining a temperature of 90℃. It contains 29 microelements which are good for health. It has always been regarded as "natural medical hotspring".
In the ponds near the hotspring, there herds fishes and ducks, which are quite delicious. They are called "Tang Fish" and "Tang Duck" and were tributes to the emperor in Ming and Qing Dynasties.