冠亚和值3至19排除法

简介：In the eleventh year of Chongzhen, Lu Xiangsheng, then governor of Xuanda, wrote a memorial on the matter, outlining the pros and cons. Emperor Chongzhen accepted Lu Xiangsheng's suggestion and agreed to conduct legal trade with the Mongolian tribe controlled by Jianlu, in order to first stabilize the Xuanfu. Border defense, and then try to drive a wedge between Manchuria and Mongolia. At the same time, much-needed war horses can also be obtained from Zhangjiakou trade.