Thailand is the idea that people from the south of China, because there are many scholars who agree with the idea that the local people of Thailand are from the south of China.
Thai people believe that idea is likely to come from the South of China, because there are many scholars who agree with the idea that local Thai people's original, it comes from the South of China.
I believe the idea that Thai people would come from the south of China because there are many scholars who agree with the idea of a place of residence of the people of Thailand, was originally from the south of China