Dai is a nation with a long history. As early as the first century AD, there were records about Dai in China history books. After 1949, it was named "Dai" according to the wishes of the Dai people. Dai people call themselves "Dai Nuo" and "Dai Ya". The Dai people generally believe in Hinayana Buddhism and many festivals are related to Buddhist activities. The annual Water-Splashing Festival is held in June of Dai calendar, which is the biggest festival. In Dai language, it is called "Sanggan Bimai". At that time, the Buddha will be worshipped and a banquet will be held to entertain monks, relatives and friends to splash water on each other. Now, water splashing is the main content of the Dai New Year Festival, which is deeply loved by people of all ethnic groups.