阶梯倍投最佳方案

简介：Originally, Yizhou was to the north of Jinzhou. If the Ming Dynasty troops left Shanhaiguan and marched from Ningyuan to regain Jinzhou, then Yizhou would be the rear of Jinzhou and continuously provide and support Jinzhou. Back then, the Jianlu were able to besiege Jinzhou for a long time, relying on The most important thing is the farmland in Yiju.