The Ten-kilometer Aspen Forest is just located in the open area after the entry to the valley. The valley and mountains separate the two villages, leaving the mountain area with numerous species of animals and plants. Mt. Siguniang is covered by luxuriant vegetation. The vegetation in Shuangqiao Valley is divided into three forest belts due to the variation in altitude: The first ten kilometers is mainly a mixed forest belt of broad-leaved and miscellaneous trees, mainly the poplar forest; the middle section is wondrous hippophae rhamnoides; and the last section is a mixed coniferous forest belt, mainly the larix mastersiana.