Among the regions it is divided into include the Ka-shun in the west and the Ala Shan in the south.  
Its northern border is defined by the Hangayn Mountains and the Greater Khingan Range to the east.  Among the regions it is divided into include the Ka-shun in the west and the Ala Shan in the south.  That western Ka-shun region is bounded by the Pei and Tien Shan Mountains, while the Ala-Shan in the south is partly skirted by the Huang-Ho River.  FTP, identify this region coming from the native word for "waterless place," a desert stretching across China and Mongolia.
Its northern border is defined by the Hangayn Mountains and the Greater Khingan Range to the east.  
Gobi Desert