Building Weapons in Prison, I Shocked a Five-Star General

[Urban fantasy] + [Technical wish-fulfillment] + [Prison drama] + [Building a military-industrial powerhouse] + [The strong return] + [Mastermind behind the scenes]

Su Mo, a genius military engineer, is framed and sent to prison, where he's forced to take jobs on the prison black market. He only meant to build a few little gadgets for cigarette money, but ended up alarming the military's top brass, who sealed off the prison overnight. The warden begs me to upgrade the prison's defense system, so I turn around and build an underground arms factory. Then a four-star general arrives in person and sees the miniature nuclear fusion device being assembled in my cell... He asks, trembling, “Sir, how much longer do you plan to stay in prison?”