Introduction to Crescent Lake: Crescent Lake is named after its shape resembling a crescent moon, and its lotus flowers are one of the best outside the Great Wall. There are 50 species of trees, 70 genera of shrubs, and 413 species of various grasses growing in the lake area. It is home to Khandaq, roe deer, black bear, Ussuri raccoon dog, hawk rat, snow rabbit, red-crowned crane, swan, heron, mandarin duck, etc. More than 40 species of precious animals.