15个数复三中三多少组

简介：The reason is also simple. In addition to the fact that the imperial court wanted to build the second line of defense into a copper and iron wall to prevent the captives from passing through, there was no need to go beyond the third line of defense. Moreover, because the second line of defense was Gyeonggi, where the emperor was, the third line of defense was Hejian Prefecture may suffer losses, but Gyeonggi Province must not suffer losses.