Xu Qing, a modern young man, traveled through the battlefield at the end of the Yuan Dynasty and met and befriended the down-and-out Zhu Yuanzhang by accident. Relying on modern knowledge and advanced strategies, he assisted Zhu Yuanzhang in recruiting troops, subduing powerful generals such as Chang Yuchun and Lan Yu, outsmarting Dingyuan and Chuzhou, and establishing an elite Ming army. Xu Qing built a Shenji camp, improved firearms and gunpowder, and used dimensionality-reducing strikes to sweep across the rebel and Yuan armies. He helped Zhu Yuanzhang conquer Yingtian and destroy the heroes along the way, and finally succeeded in the Northern Expedition and established the Ming Dynasty. After the world was stabilized, Xu Qing retired after success and went to sea with his confidante, leaving behind a legend that changed history.