Ming Dynasty 1643, My Firearm Is Invincible in the World

The protagonist travels back in time to Liu Tieniu, a young bandit who lived in the 16th year of Chongzhen. He awakens Golden Finger, fights against the bandit leader, meets a beauty, forms a firearms unit, fights against Zhang Xianzhong, defeats Zuo Liangyu, and kills the Eight Banners of Manchuria. Relying on absolute force and technology to crush, drive out the Tartars, overthrow the hopeless Zhu Ming Dynasty, and create a brand new world for the Han nation.