Courtyard House: Starting as an eighth-grade worker, with too many wives.

When Li Jianguo woke up, he found himself an orphan being bullied in a courtyard house. His home had been taken over by the Jia family, and his parents had been driven to their deaths.
Just as I was about to get angry, the God-level Sign-in System activated!
[Gene Potion] Strengthens the body, one punch and you're done for.
[Master-level culinary skills] The aroma of meat fills the yard, making even the neighbor's drool.
[Holy Aura] is activated. Anyone who harbors ill will suffer misfortune as soon as they step outside.
Yi Zhonghai broke his front tooth, Sha Zhu broke his leg, and the deaf old lady was hospitalized twice!
I thought it was just a lighthearted story about everyday life, until I found out on my first day at work that I got a [Rotary Engine (Complete Blueprints)].
The foreign expert hired by the factory publicly mocked, "What technology do young Chinese people know?"
I silently pulled out the blueprints, pointed them at his nose, and said in English, "Open your eyes and look carefully. This is a modified Mazda, twenty years more advanced than the old relic in your hand."
The room fell silent. The experts were pale, and Old Qi's hands trembled with excitement.
The entire hospital's beasts were unaware that they had offended not just an ordinary engineer.
He was a national treasure-level figure who enabled China's industry to take off ahead of schedule.
By the time they realized what was happening and tried to curry favor, it was too late.