Cultivation of Immortality: Unscientific Cultivation of Immortality

[No system + no routine + nonsense + warmth + group portrait light novel] Cultivation of immortality without science will bring endless happiness! Lu Han, who was dressed in tatters, held a book with a yellow cover and said with a smile: "I'm amazed by your bones. You are a natural genius in cultivating immortals. I'll sell you this book "Self-cultivation of Immortal Cultivators" for five copper coins." The boys and girls cried out "Wow" one after another: "There are bad guys!" "..." Lu Han felt very distressed: I have traveled through time and experienced hardships, and finally achieved the great enlightenment. Why is it so difficult to help me reach the immortal path in a serious way? (The protagonist is cute and sinister without knowing it, the introduction and beginning are weak, please read the follow-up)