The God of World Building: from a Humble Guy to the Top Player in the World

In his previous life, Ji Conn, a migrant worker who stayed up all night to rush to work and suddenly died on a construction site, was reborn in a parallel world where everyone changed jobs. At the job transfer ceremony, he awakened and was recognized as the bottom-class F-class wasteful profession - a construction worker. He became the laughing stock of the whole school on the spot. Full of unwillingness to roar, the Loli system "Concrete Bud" was accidentally activated: the bricklayers built the wall into a copper wall and an iron wall, the supervisor's eyes penetrated the flaws in all things, the shield traversed the desperate situation, and the tower crane killed the alien beasts. From slapping counterattacks in vocational high school to cheating in secret realms, from building city defense lines to building the Great Wall and floating palaces, the former gray warriors have been soaring all the way, and finally become the god of world building who overturns the professional structure!