Origin of the Tai People 5―Cradle of the Tai People and the Ethnic Setup Today deals with the early homeland (or ‘Urheimat’) of the Tai people and the contemporary ethnic makeup of the area. New evidence emerged across various academic disciplines that the people who spoke Tai-Kadai languages at the time in history when the first Han Chinese moved southwards across the Yangtze River never spread across the vast southern Chinese region but were concentrated in the more concluded (and mountainous) area of modern provinces of Guangxi, Guizhou, Guangdong and Hunan of southern China as well as the adjoining modern provinces Ha Giang, Cao Bang Lang Son and Quang Ninh of Northeast Vietnam, even extending into the Red River Valley as we now know.