Yes, I Know I Am Invincible

[Invincible flow + time travel + system + cultivating immortality + self-knowledge of invincibility] Lin Luo traveled to the world of cultivating immortals, but the system directly made Lin Luo invincible without him having to practice. He took in his lovely disciple Bai Qing, and the great demon who transformed into a human form and became a cat-eared girl, and whose body was in the holy realm, became his pet. Lin Luo directly became the "Grandpa of the Ring", leading his apprentice to become stronger step by step. The protagonist is invincible and protects his apprentice. Don't be angry, don't feel aggrieved. There's no need to think about it, just watch it and it's done.