An 80-Year-Old Man in the City Has a System

What changes will happen to an 80-year-old man after he gets the system? A different perspective, A different experience. Ps, this book is a relatively leisurely novel, and there are very few forced slaps in the face. After all, the protagonist is an old man. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.