Siheyuan: Silly Zhu's Own Brother, Wielding a Divine Book of Technology!

Something unusual happened in the courtyard house. He Yudong transmigrated and became Silly Zhu's younger brother, but his elder brother thought of nothing but giving things away to support the Jia family. He was even planning to throw He Yudong out so he could marry. Fine, then, let them split up! Anyone who wanted to be a sucker could take the job. He wasn't playing along.

From the day he moved into the storeroom and started living on his own, things began going his way. With the System at his side, even the little bits of profit he got from trading miscellaneous items could turn his plain meals into something that smelled of meat. What was more, he had a set of technical skills at the steel mill that no one else could take from him. He was going straight from the fourth-grade qualification exam to the sixth, and his wages were about to double.

The neighbors couldn't sit still. Jia Dongxu, who had been stuck at grade two for three years, made a bet with him: the loser would have to call the winner