1. Dai people are widely distributed, with a world population of about 66 million. Mainly distributed in southwest China, northeast India, northwest Vietnam, northwest Cambodia, north-central Myanmar, Laos, Thailand and other regions and countries.

2. Most Dai people have the habit of eating two meals, with rice and glutinous rice as the staple food.

3. Unique Dai costumes. Dai women's clothes are colorful and beautiful. Dai men generally wear collarless double-breasted or large-breasted small sleeve shirts and long-sleeved trousers, with white cloth, blue cloth or crepe as the head, and some wear hats, which looks chic.

Dai people have their own language and writing. The language is divided into three major dialects, namely Siam, Rana and Thai, and several sub-dialects. Each dialect has the same grammatical structure, and the pronunciation gap between adjacent dialects is very small. With the widening of spatial distance, dialects can be easily communicated anywhere.

5. Dai architecture is greatly influenced by social environment and ideological customs, and the main buildings in different regions are also different. Dai architecture is influenced by natural environment such as climate, altitude, topography and building materials, and social environment such as population, economy, religion, politics, science and technology and ideology. It mainly includes elegant and dexterous dry-fence architecture represented by Dai folk houses in Xishuangbanna, thick and sturdy flat-topped earth palm houses represented by Dai folk houses in Yuanjiang and Honghe, and elegant and rich Buddhist temple architecture.

6. The Buddha Washing Festival ("washing orchids" in Dai language), also known as "Water Splashing Festival", originated from a ceremony of Brahmanism in ancient India, was later absorbed by Buddhism, and was introduced into Dai areas with Buddhism from the end of 12 century to the beginning of 13 century. With the increasing influence of Buddhism in Dai areas, the Buddha Bathing Festival has become a custom of Dai people and has been circulating for hundreds of years.

According to their distribution areas, the Dai people in China call themselves Dai Lu, Dai Na, Dai Ya, Dai Zhan and Dai Duan. Xishuangbanna and other places call themselves "Dai Lu", Dehong and other places call themselves "Dai Na", Xinping and Yuanjiang in the middle and upper reaches of the Red River call themselves "Dai Ya", Ruili, Longchuan and Gengma border areas call themselves "Dai tension", and Mangjing and Mangna in Lancang are branches of Dai tension. Han people call Dai Lu Shui Dai, Dai Na Handai and Dai Ya Huayaodai.