Crossing the Ming Mountains and Rivers

In the twenty-fifth year of Hongwu's reign, Chen Du woke up from a ruined temple, penniless, and surrounded by several refugees who had frozen to death. He traveled through time. This is Zhu Yuanzhang's later years, Zhu Yunwen is about to ascend the throne, and King Yan Zhu Di is secretly sharpening his minions. Chen Du knew that the Battle of Jingnan would eventually come, but what he wanted to do was not to predict history, but to change it himself. From being a handyman in a hundred households to being a clerk in the weapons repair branch, from repairing an old gun with a blown barrel to building a water-powered hammer workshop, from a bottle of alcohol to clean up businesses all over the north - he wanted to give King Yan an army that could win the war when he needed it most, and a business empire that could support the army. On the day when the Yanshan tube test was successful, it rained heavily. When the projectile penetrated the wooden board eighty steps away, Baihu Zhang Qi patted the blunderbuss tube and said to the old blacksmith: "This is not a fire blunderbuss. This is a life-saving thing." Old Tietou looked down at his hands, which were covered with burn scars - these hands had been used as hoes and sickles all their lives, and now they had produced the first rifled blunderbuss tube of this era. They are creating a new era. Start from the blacksmith shop at the foot of Yanshan Mountain.