Fired, I Strike It Rich With the Three Kingdoms at My Back

The protagonist, Ma Zhongliang, worked hard for three years after graduation, only for his boss's brother-in-law to steal the fruits of his labor. Then the man paid someone to run him over and kill him. But by a twist of fate, Ma was sent to the end of the Eastern Han dynasty, just as the Three Kingdoms era began. At first, he planned to go back and start a business, but one mishap after another led him to take Da Qiao, Xiao Qiao, and Zhen Mi along with him. He thought his rotten luck would get him killed, but unexpectedly, he even managed to travel back, becoming a merchant who trades across time. He sells knowledge and seeds to Boss Cao, then hauls Boss Cao's gold back home. Becoming an official? Not a chance. He'll never work for anyone again. He's a merchant, a merchant who knows how to make money.