In fact, strictly speaking, the Dai people in China and Thailand belong to the same nation. In addition, the Dai people in China, the Thais in Thailand, the Shan people in Myanmar, the Lao people and the Assam people in Assam, India all belong to the Dai-Thai ethnic group.
Dai people are considered to be decadent prisoners who originated in the Han Dynasty in China history. They established the first political power in Dai history-Daguangguo, which is also a decadent prison country recorded in China history books. However, the decadent country was later attached to the Han dynasty, so the Han dynasty set up Yongchang County to rule. After accepting the rule of the Han Dynasty, the Dai people made great progress in cultural development by absorbing the advanced civilization of the Central Plains Dynasty.
Later, the Dai and Thai nationalities began to migrate to the surrounding areas on a large scale from the13rd century. After the Mongolian army conquered Dali and Bagan dynasties in Myanmar, it caused great turmoil, produced a squeezing effect and accelerated such a process. As a result, more Dai-Thai tribes migrated to Southeast Asia, and they gradually merged with the local aborigines, resulting in today's living in China and staying.
In fact, among the numerous Dai and Thai ethnic groups, the most successful one is undoubtedly the Dai nationality, the main ethnic group in Thailand today. Because they established the first dynasty in the history of great powers-Sukhothai Dynasty in the13rd century. Later, Dacheng Dynasty, Wuli Dynasty and Bangkok Dynasty were successively established. In fact, Zheng Xin, the founder of the Wu Dynasty, was the son of a China businessman who married a local Dai woman.
Therefore, the Dai people in China and Thailand are also considered to be the same nation. Because Thailand has great influence and international influence, it is called Dai people. But the Dai people are actually mixed with a large number of Khmer Mongols, while the Dai people in China are relatively pure.