The costumes of the Yao people in Nandan County, Guangxi Zhuang Autonomous Region are very distinctive among the costumes of the Yao people in Guangxi. They are divided into men's and women's clothing. Men's clothing is divided into formal and casual clothes. The main decoration of the clothing pattern is the chick flower, which can be seen on both men's and women's clothing, reflecting the reverence for chickens. The casual clothes of the Yao men in Nandan are blue-black stand-up collar double-breasted clothes, with a chick flower pattern embroidered on each side of the chest; the pants are made of white cloth, just above the knee, and the trouser legs are trimmed with black cloth. The outer edges of the tops of the formal clothes of the Yao men in Nandan are trimmed with blue cloth, and the sides of the waist and the lower edge of the back are embroidered with chick flowers and rice patterns. The knees of the white pants of the Yao men in Nandan are embroidered with five red patterns. According to folk legend, this is the blood handprint left by the Yao king during the war with foreign tribes. The summer tops of Nandan Yao women are called "Gua Yi", which are made of two square pieces of cloth, the front is pure black, and the back is made into various patterns by dyeing and embroidery. Winter tops are generally right-fronted, sleeved, and buttonless. Regardless of winter or summer, Nandan Yao women wear blue knee-length pleated skirts on the lower body. The skirt surface is painted and dyed with tree sap to form three groups of circular patterns, and the skirt edge is trimmed with red non-woven silk sheets. The tops and skirts of Nandan Yao women's clothing are all made of unique tree sap dyeing technology. Whether it is embroidery, embroidery, inlaying, or dyeing, its physical form has become a kind of national cultural symbol, expressing the life interest and specific cultural ideas of the Nandan Yao people, and has an important position and value in the clothing culture of China's ethnic minorities.