He Yuzhu's Different Life

No time travel or rebirth, no system cheats. He Yuzhu, a cook at Red Star Rolling Mill, suddenly sees the light. In the past, he was always kind to his neighbors, only to be met with increasingly brazen scheming. After experiencing the ways of the world and human hearts, he puts away his misplaced goodwill and focuses on protecting his younger sister, who is preparing for the college entrance exam. He stays at his post in the canteen, navigating the hustle and bustle of the courtyard, neither provoking nor being provoked, but never allowing himself to be bullied. In these hard times, he protects his family, lives his life, and lives out a different kind of existence. — Description from novelcodex.org