share time: 2026-01-01 06:21:45
12-year-old prodigy Lin Xiaochuan has to substitute for his grandfather, a university math professor who suffered a sudden heart attack, to teach Advanced Mathematics. The college students waiting to mock him are shocked by his tricks—using game heroes to explain functions and comics to illustrate formulas. This "little brother" in a red scarf, standing on tiptoe to write on the blackboard, is actually his grandfather's "secret research assistant." When a rebellious student gives a tough question but gets "countered" by Xiaochuan's grandfather's manuscript, and when he sends a voice message to his grandfather during the break saying "I didn't forget your teacup," this "cutest classroom" hides the warmest grandfather-grandson love and makes the students realize that "knowledge has nothing to do with age."
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