3期必出三期必出持

简介：——According to the previous investigation by the Mongolian Branch of the Military Intelligence Department and the analysis of the Military Aircraft Department, the troops transporting grain, grass and supplies must pass through the Khan Loop. In addition, there are many trees and reeds in the Khan Loop, making it a good place for an ambush. Therefore, Wu Sangui chose the Chanhan Loop as the place to ambush.