Thriving in Prison After Being Locked Up

Li Qingyi, a top modern negotiation expert and close-quarters combat master, is transported to a parallel world and imprisoned on false charges. Starting as the most downtrodden inmate, he uses his silver tongue to break deadlocks, his fists to suppress evil, and his wits to seize power. He navigates both the criminal underworld and the prison guards, gradually rising to become a top-tier boss whom no one dares to provoke in the darkest of cages. — Description from novelcodex.org