快3买大小单双最合理的投注方法

简介：After this battle, the Ming Dynasty strengthened its defense in the Yutailing area. Over the past hundred years, most of the Mongolian attention was focused on Zhangjiakou, and few troops appeared in the Yutailing area. In comparison, the Ming army's defense in Yutailing was weaker than that in Zhangjiakou and other places.