Engineering Guide to Immortality

Lin Mo, mechanical engineer, time travel. There is no system, no golden fingers, and no grandpa. When I woke up, I was lying among a pile of dead people. As soon as I crawled out, I was treated like garbage. This world of cultivating immortals is unreasonable. Weakness is the original sin. If you die, you will die. But there is one thing he knows how to do: observe, analyze and optimize. While others practice the exercises according to them, he is changing the blueprints of the exercises. The rules of this world are set by the strong. What if he figured out the loopholes in the rules?