9个数字三中三有多少组

简介：At the end of the Ming Dynasty, the Jianqiu people rose up, and the Mongols surrendered to the Jianqiu people. Without the private horse farms in Hebei and Shandong, the cost of buying horses from Mongolia in the Ming Dynasty increased sharply, reaching 50 taels of silver per horse at the peak and 30 taels at the lowest. The rising price of war horses pushed up the cost of establishing cavalry for the Ming army.