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At 80, I Survive with a System

An 80-year-old man, on the verge of death, gains a Lifespan System. By earning favorability, he can extend his life and receive various attributes as rewards.
His singing reaches perfection, effortlessly defeating top-level singers.
His martial arts are invincible, knocking out world champions with a single punch.
His medical skills are unparalleled, with even the greatest doctors bowing in respect.
He can read minds and predict the future.
In the human world, he is invincible.