The migration of the population from growing into the distribution area, including the development of the greater Chiang Mai, Chiang Rai and is central to the development of the regions themselves.
Population migration less due to the spread prosperity into more areas. Including the development of the city Rai and development hub of the region itself.
Population migration is less due to the distribution of growth to the area. As well as the development of the city. And Chiang Rai is central to development of the region.