Lu Ze awakened the "Heaven Technology Tree", but found that the system only used myths and legends as instructions.
"Hot Wheels" is a plasma engine, the "Golden Cudgel" is a variable metal, and the Somersault Cloud is a theory of curvature transition - but all of these require him to make them by hand in his own small workshop.
When foreign countries blocked lithography machines, he handed over the room-temperature superconducting "cold iron"; when the aircraft carrier was in urgent need of electromagnetic ejection, he handed over the "finger-finger magical power" device.
Until one day, the military pointed to the Nantianmen Project and asked him: "This space carrier... Did you really make it out of mythology?"
Lu Ze pushed up his glasses: "I said I was a repairman, you must not believe me."