I Can Live Forever by Adding Some Points and Being Invincible.

[System Idle, Add Points, First Gou, Single Female Protagonist, Decisive Killing] Traveling through a different world, Lin Siyuan, who has immortality, obtains the on-hook system. As long as he stays on, he can slowly become stronger, and killing monsters can also speed up his cultivation. Lin Siyuan, who was adopted since childhood, was adopted by his adoptive father Lin Zhenyuan, who was a member of the Demon Slayer Department's Hundred Demon Slayers. Eight hundred years ago, Taizu Taizu of the Great Wei Dynasty established the Wei State, swept away domestic demons, resisted surrounding countries, and established the Demon Slayer Division. Lin Siyuan originally wanted to survive, but the demons were causing trouble in the world. In order to become stronger and survive, he could only become stronger step by step. He killed the evil demons of Wei Kingdom, resisted the demons of neighboring countries, traveled to various regions of the mainland, traveled all over the world, and became the supreme powerhouse. Let's see how Lin Siyuan moves towards the strong step by step.