Global Class Change: How About a Cannon to the Face?

[System-Focused] + [Mass Troop Deployment] + [Decisive and Ruthless] + [Behind the Scenes]

Gu Ming is stunned! After transmigrating into a world where everyone awakens a profession, he, the top student in culture, has somehow become an F-rank builder?

Once a god-tier profession, now reduced to roadwork! Mockery, sneers, the goddess turning him down... A hell-mode start from the start?

Ding! [God-Tier Construction System] acquired! Interstellar Human technology tree unlocked!

Machine-gun bunkers → built in an instant! Rat-tat-tat, clear the field!

Tank factories → mass-produce troops on an assembly line! A steel torrent rolls over everything!

Nuclear missile silos → ultimate deterrence! You call this F-rank?!

From a defensive position in a corner of campus to a steel wall spanning the continent;

from a mocked “repairman” to the “Steel Tyrant” who makes the entire world tremble!

Beast lords? One Wolf Warrior missile sends them packing!

Enemy forces? Flattened by Cougar heavy artillery positions!

Gods from another world? Gu Ming says, “I hear your divine realm is pretty big. Perfect, I can use it for my next forward base!”