A QUANTUM MECHANICS CULTIVATOR

A hidden old man emerged from the ring, tightly concealing and teaching top-level martial arts like squeezing toothpaste. Did a "ding~" sound ring in his mind after being inserted into strange systems? He traveled back in time and became a transcriber who implemented the theory of dimensional reduction using knowledge from the future. My goodness, it's already 2023. Are there still people using these outdated cheats, including Xia Yi?
However, why must the old man hide and conceal, why not directly teach top-level martial arts? Why must the "system" be an external object, can it not be cultivated internally? Why travel back in time to use future technology for dimensional reduction? Eureka! The indigenous Xia Yi who crossed the mountain range shares quantum mechanics with you.
Finally, there is a question. After obtaining these golden fingers, what kind of person should one choose to be?
Since you have sincerely asked, I will kindly tell you! To prevent the destruction of the world, to maintain world peace, to help the oppressed resist tyranny, be a consistent and happy person!