Li Shaofeng obtains a Lifespan Investment System, but he has only 20 years left to live. However, whenever he invests his lifespan in someone and that person achieves something, he gets back double the lifespan he invested.
He majored in physical education at a teachers' university and wanted to apply for a PE teacher position. Instead, he was tricked into becoming a homeroom teacher.
Faced with a class whose foundations are terrible, he has no choice but to invest his own lifespan in his students.
"Run 10,000 meters, intelligence increases by 0.1 points."
"Do 1,000 military-style punches, intelligence increases by 0.1 points."
"Do 1,000 squats, intelligence increases by 0.1 points."
"Jump rope 10,000 times, intelligence increases by 0.1 points."
"..."
Other people invest money. My investments cost me my life!
This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.