The Dashing Crown Prince

After dying, Ye Qingyun, a young man from modern times, transmigrates into the body of the Crown Prince of the Great Mo Empire. With the emperor's health deteriorating and power slipping away, he must survive in the cracks under the Grand Tutor's thumb. He gradually dismantles the Grand Tutor's faction and builds up his own, all while advancing technology. Midway through, the Grand Tutor sees that the tide has turned and joins forces with foreign nations to launch an invasion. Drawing on his modern knowledge and the technology he has developed, the protagonist resolves the crisis and then deposes the Grand Tutor. Afterward, he continues advancing technology until he rules the world.