Swamp introduction: At an altitude of 850 meters, there is a swamp, about 20 acres, with dense wet herbaceous plants and several acres of fertile farmland. The mountain is derived from this "ancient field" name. It is recorded in the "Unification Chronicles of the Qing Dynasty": "Gutianshan County is a hundred miles west and fifteen miles high. In the mountains, tigers do not bite, snakes do not sting, there are hundreds of acres of fields, and there are springs beside the fields. The springs come out of two sinuses, and the bottom is a dragon. "Every time it rains, there are always clouds floating in the sky."