大小单双组合概率学

简介：Songshukou is located in the southwest of Hetunala, more than a hundred miles away from Hetunala. Although there are Weizi Valley and Crow Pass behind it, the road is difficult and it is not conducive to advance, but now Hetunala is full of old and weak people. , once the Ming army approaches, Hetunara will have no ability to fight back.