Ninety thousand mountains, known as "the first land to see the sun rise", the original forest coverage reached more than 98%, the total area of the National Nature Reserve was 560,000 mu, and the key water reserve was 25 square kilometers. A national class of protected plants, and dinosaur contemporaries, known as the "living fossil" of the Alsophila in the streamside pavilion, everywhere. The stratum of Jiuwanshan Mountain is one of the oldest strata in Guangxi. The water source of Dingdong Spring comes from the granite crevice of Jiuwanshan Mountain, which is a natural weak alkaline soft water.