Xinping Yi and Dai Autonomous County belongs to Yuxi City. The total area of the county is 4,223 square kilometers, with a total population of 285,000. There are 17 ethnic groups in Xinping County, including Yi, Dai, Hani, Lahu, Hui, Bai, Miao, and Han, with unique ethnic customs. The costumes of Xinping Yi people are black-based and decorated with embroidery. The costumes of Xinping Yi women are rich and colorful, with different characteristics in different regions, including Lukui Mountain type, Mopan Mountain type, Xinhua type, Laochang type, and Ailao Mountain type. The most distinctive is the Lalu branch in Jianxing Township. Most Lalu women wear beautiful aprons to go to the streets, visit guests, and visit relatives. Lalu women start to wear aprons when they are seven or eight years old. It is made of several colorful pieces of cloth and inlaid with silver bubbles. Each apron requires at least 200 silver bubbles to be inlaid, and as many as 684. Whenever there is an auspicious festival, women will tie on dazzling silver bubble waistbands to dance and sing. The silver bubble waistbands add unique charm and interest to the joy of the festival.