At a Hundred, a Saintess Took My Chastity, So I Seek Immortality Through a Divine Tree

At a hundred years old, Li Ping is stuck at the bottom of his sect, suffering abuse from his fellow disciples. With his lifespan nearly exhausted, he happens upon the Saintess, who has been poisoned by a Gu. Though a hundred years old, Li Ping cures her, and the two fall in love. Then Li Ping awakens an ancient divine tree, rises against all odds, and stands atop the human race alongside the Saintess!