Introduction to Long Sheng's Changfa Yao performance: Yao women dress up and wash their hair by the river. Those who can show their hair in public are all married women, that is, sister-in-law or grandma. This is also one of the folk customs of the Hongyao people. The hair of an unmarried girl is wrapped in black cloth and cannot be seen by outsiders. Only on the wedding day, her husband is the first man to see her hair. This has also become an important symbol to distinguish the marriage status of Hongyao women.