I Traveled to Another World and Became the God of War

One-sentence summary: Jiang Fei, a young genius in the city, was involved in a tragedy caused by a class reunion. Just because of an unclaimed lottery ticket, Fa Xiao, who has been with him since childhood, stabbed himself. Severe pain struck, and he was already in an alien world where killings continued. How did the young man who used to carry a heavy burden, be gentle and righteous, climb this world with punches and kicks and reach the peak of the God of War?