Changhan districtChanghan is a district in the northwestern part of Roi Et province, northeastern Thailand.GeographyNeighboring districts are : Chiang Khwan and Mueang Roi Et of Roi Et Province; Mueang Maha Sarakham of Maha Sarakham province; Khong Chai and Kamalasai of Kalasin province.HistoryThe minor district Changhan was established on 1 April 1989, when five tambon were split off from Mueang Roi Et district. Tambon Yang Nai was split from tambon Pa Fa in July 1989, and Phakwaen from Muang Lat in July 1990. On 8 September 1995 the minor district was upgraded to a full district.AdministrationThe district is divided into eight sub-districts, which are further subdivided into 110 villages. There are no municipal areas; there are eight tambon administrative organizations.