Jump at the Beginning to Activate the Potential Explosion

The protagonist Zhang San is a commoner in the world. When he was sick and weak since childhood, his old dreams would reappear. Little did he know that this was a self-protection mechanism of the human body. After living in a miserable world for 30 years, with accumulated debts and serious illnesses, the protagonist originally wanted to be done with it, but his instinct for survival made him commit suicide. There should be no end to the road. By coincidence, Zhang San got the fragment of the secret book, and was lucky enough to get a glimpse of the original secret book; a journey of cultivation that became more enjoyable and stronger began...