Jiuzhaigou Locates in Nanping County, Aba Tibetan-Qiang Autonomous Prefecture, Jiuzhaigou Ravine stretches 80 kilometers in one direction and takes up an area of more than 60,000 hectares. The area consists of six scenic spots——Changhai, Jianyan, Nuorilang, Shuzheng, Zharu and Heihai. It becomes a world renowned scenic spot because of its diversity in natural scenery which includes snowy peaks, double waterfalls, colorful forests and green sea. Furthermore, Tibetan customs are another attraction. It was listed as a world heritage site in 1992.