City: Grandpa Returns to Twenty-Three

Xu Jin traveled through the parallel world and became a living treasure of his grandfather's generation. Just when he was envious of the energetic young people, the cheating system came and brought him back to twenty-three! This is embarrassing. Looking at the young and promising children, the young and lively descendants... Xu Jin was completely stunned. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.