History of Xilingol
Xilingol, Xilin Gol, Shiliin Gol or Xilinguole Aimag/League is one of 12 leagues of Inner Mongolia. The seat is Xilinhot, while the area is 202,580 km2 (78,220 sq mi). The league’s economy is based on mining and agriculture.
Xilingol borders Mongolia to the north, Chifeng, Tongliao and Hinggan League to the east, Ulanqab to the west and Hebei to the south.
This is the only prefecture-level division of Inner Mongolia in whose south border nomadic culture is still vivid. Some division, such as Tongliao, has a much higher percentage of Mongolian population but agriculture is extensive among Khorchin Mongols there. Xilingol League is also the closest Inner Mongolian prefecture-level division to Beijing, although among those Inner Mongolian prefecture-level divisions bordering Hebei, the province surrounding Beijing, Xilin Gol is also the most unapproachable one. With a significant population of Chakhar Mongols, who speaks a Mongolian dialect closely related to the standard dialect of Mongolia, the dialect spoken in Xulun Hoh Banner, Xilin Gol League is chosen as the standard language of Mongolian in China, nevertheless the de facto common standard is a mix of Khorchin-Kharchin and Chakhar, due to an extensive Khorchin Mongolian speakers presence in China.
Source From: https://en.wikipedia.org/wiki/Xilingol_League