倍投四次还是五次止损好呢

简介：Immediately, Jianlu began to test the cannon. They pushed all forty giant Hongyi cannons under the North Ridge. Three miles away from the North Ridge, they built an artillery array with sandbags, earth and rocks. In the evening, bang! Jianlu's first artillery shell sounded, roared out from the artillery array, and hit Beiling.