You Are Asked to Sail a Ship to Deliver Goods, and You Repair the Aircraft Carrier?

Lu Chen traveled to Blue Star and had to sign a five-year voluntary labor agreement with the supermarket owner in order to repay his alcoholic father's debt. Glorious supermarket delivery guy? No Under the halo of the protagonist, mechanical maintenance is his main business! With his maintenance system, anything can be repaired as long as it is a machine! When he used a 5-cent pencil lead to repair a paralyzed aircraft carrier, the entire military was stunned! Pencil lead is used as the core of power transmission, and the power is increased five times? Recently, the style of painting at the entrance of the small supermarket has changed... The technical director of the Academy of Military Sciences transformed into Pancake Brother. Are all the hat comrades disguised as plainclothes? "I'm just a grocer making some extra money. You think I'm comparable to an academician?"