选十复式十一码中4个

简介：Sulfur is the key to making gunpowder, but the Ming Dynasty produced very little of it every year, and 80% of it was imported from Ryukyu and Japan. The new army in the Beijing camp mainly relies on firearms, and sulfur is absolutely indispensable. Once a war starts, the cost will be huge, so plans must be made early to import more and better sulfur.