Lin Youzhi is Lin Feng's distant relative and neighbor, a construction contractor. He married Zhang Yurou as a live‑in son‑in‑law, using his wife's family connections to prosper. He is often absent from home due to work and is implied to have an extramarital affair with his secretary Chen Yanyan. On the day of the insect outbreak, he flees the construction site in his new car with Chen Yanyan but is attacked by giant worms along the way. He drives back to the community mortally wounded and dies after handing his pistol to Lin Feng, asking him to protect Zhang Yurou. His death marks the catalyst for the main action and provides Lin Feng with the weapon needed to fight.
