Rehe Province, referred to as Re for short, Chengde City, the provincial capital, existed from February 2004191July 30, 955. The province's jurisdiction is equivalent to the whole territory of Chifeng City, Inner Mongolia Autonomous Region, most of Tongliao City (west of Horqin District), Yixian County, Liaoning Province, north of Jinzhou City, west of Zhangwu County, Hebei Province, and most of Chengde City. In 17, according to the survey of geographical society, the area of the whole province was about147,500 square kilometers. According to the new map of the 23rd year of the Republic of China, it is 173960 square kilometers. In 36 years, the province's area was 179982.05 square kilometers. It borders Liaoning Province and northern Liaoning Province in the east, Chahar Province in the west and Hebei Province in the south.