Chasing Light and Returning to Shadow

My name is Cheng Yi. In this world, there are children of destiny who have the power of heaven and their breakthroughs are like drinking water. There are also people from outside the world who call themselves time travelers. Is there any system that can serve as prophets and help improve their cultivation. But I have none of these, just like most ordinary practitioners. I don't know what the system is that those outside the territory call it, and I don't know why it can directly improve cultivation without any side effects. I definitely won't use it! Because it is not in line with the Tao in my heart, I always believe that only what you practice diligently and down-to-earth is your own, rather than opportunistic and relying on external things. And there must be something wrong with something like this that can directly improve your cultivation! Finally, I arrived at a higher level world, which proved that I was right, and I also discovered the secret of the "system"...