8个数字选7个有多少种组合

简介：After the Fengfeng Banquet was over, both sides killed horses to offer sacrifices to heaven and formed an alliance through bloodshed. The three great Khans gnashed their teeth and swore that they would help the Qing Dynasty defeat the Ming Dynasty. Dorgon also swore that he would definitely hand over the Mongolian Jade Seal if victory was achieved. If there is any violation, both humans and gods will be punished!