Lin Ye, a 22-year-old vocational college student studying construction engineering, is caught in a cave-in at a tunnel construction site in Enshi Grand Canyon. Clutching his battered copy of Practical Guide to the Second-Class Constructor Exam, he unexpectedly transmigrates to another world. When reinforced concrete meets a primeval land, and modern infrastructure expertise faces a chaotic realm overrun by bandits and ravaged by rebels, Lin Ye awakens the Otherworld Infrastructure System. He is no longer a laborer keeping his head down at a construction site, but a city-builder armed with blueprints and formulas.
Starting by protecting Qinghe Village, which is on the verge of destruction, he builds walls with rammed earth, lays traps using the principles of mechanics, and digs wells and canals with his knowledge of water management to store water and guard against drought. As crude thatched huts become sturdy brick houses, muddy dirt roads widen into smooth highways, and a tiny village rises into a well-supplied, heavily fortified stronghold, Lin Ye's name begins to make waves in this chaotic age.
He wields infrastructure as a blade to fend off bandit attacks, uses blueprints to outmaneuver probing officials and troops, and relies on technology to lead the villagers through desperate times. Black Tiger's counterattack, Deputy General Zhao's covetous designs, and the test of drought bring one crisis after another. See how a young construction worker from the modern world uses his expertise to advance cautiously through another realm, transforming a remote, impoverished village into an impregnable fortress that commands the region, and writing his own legendary tale of a construction comeback.
