It's so Easy to Cheat and Cultivate Immortality

Hanging, every time traveler has it. But I, Lin Xingchen, am different. I have many worries and past life memories! The most powerful secret book, I have it! Mysterious Grandpa, I have it! I have a certain system! I still have the strongest physique! From the moment these attacks gathered on Lin Xingchen, he became invincible. However, is behind this invincibility the distortion of human nature or the loss of morality...