Three Thousand Years of Trial and Error

In his previous life of three thousand years, he proved that 99.9% Of the techniques, elixirs, and secret realms in the world of immortality were wrong. He was reborn with a database that recorded all the wrong answers. He knew all the pitfalls, dead ends, and dead ends that others had stepped on. This time, what he has to do is simple - find the correct 0.1% One by one. With the database in hand, you can travel across the fairy world.