After the death of modern young man Ye Qingyun, his soul is in the body of Prince Mo. Faced with the situation where the emperor's health is deteriorating and his power is falling apart, he survives under the hands of the grand master, gradually peeling off the grand master's power, achieving his own power and developing technology. In the middle period, the grand master sees that the situation is over and joins forces with other countries to launch an invasion. The male protagonist solves the crisis with modern knowledge (previously acquired technology), and then deposes the grand master. In the follow-up, he continues to develop technology and dominate the world.
The writing is okay, good luck to the author