单双游戏规则简介：In addition, Huo Gongqi Yao also introduced some Western knowledge about smelting, machinery, chemistry, mechanics, mathematics, etc. At the end, it summarizes the experience and lessons of the Ming army in using firearms to fight Houjin.
In addition, Huo Gongqi Yao also introduced some Western knowledge about smelting, machinery, chemistry, mechanics, mathematics, etc. At the end, it summarizes the experience and lessons of the Ming army in using firearms to fight Houjin.
