后二杀码口诀

简介：In fact, these three heavy cannons were the support of Jianlu from the very beginning. However, the city of Tongzhou was strong, and the three heavy cannons were not real Hongyi cannons. Their power was limited. The Ming army erected planks, which eliminated a lot of the power of the iron bullets. Therefore, the three heavy artillery never exerted the power that Huang Taiji expected.