The Zhuang people (Chinese: ?壁; pinyin: Zhu?ngz?; Zhuang: Bouxcuengh) are an ethnic group who mostly live in the Guangxi Zhuang Autonomous Region in southern China. Some also live in the Yunnan, Guangdong, Guizhou and Hunan provinces. They form one of the 55 minority ethnic groups officially recognized by the People's Republic of China. With the Buyi, TayN?ng, and other northern Tai speakers, they are sometimes known as the Rau or Rao. Their population, estimated at 18 million people, puts them second only to the Han Chinese and makes the Zhuang the largest minority in China. Longji (Dragon's Backbone) Terraced Rice Fields received their name because the rice terraces resemble a dragon's scales, while the summit of the mountain range looks like the backbone of the dragon. Visitors standing on the top of the mountain can see the dragon's backbone twisting off into the distance.