Ancient Martial Arts and Medicine

After being scapegoated and imprisoned for five years, Peng Minghui returns to the city and is arranged by his hypocritical brother to work as a security guard beside his fiancée. Facing his brother's secret schemes and the female CEO's various provocations, he uses the ancient martial arts and medicine he learned in prison to win over the female CEO through daily interactions and expose his brother's false mask. Then, using Xinhai City as a springboard, he integrates various forces, confronts the four major financial magnates, and ultimately breaks the monopoly on the latest research and development, rising to become the dark king who controls the world's rules. — Description from novelcodex.org