Going Back to the Past, I Have Space to Not Panic

Gao Fei, a veteran otaku, bought a ring online and found that it contained a mysterious fairy palace space. He thought he would go to the world of immortal cultivation to seek immortality, but when he woke up, he found that he had returned to the time. If you understand the past, you can't admonish it, but if you know what's coming, you can pursue it. Originally I just wanted to live my own life, just like a big salted fish lying flat, but there were so many trivial things to do, and I accidentally let myself go.