On the Scientific Equation of Cultivation

This is a somewhat morbid world. The people at the top divide people into three, six or nine grades. Under the light tower are countless ordinary people with all kinds of living beings. Above the light tower are the rich people's indulgences. As for outside the light tower... Who cares? What kind of sparks will Lin Yu, a talented young man from the 21st century, have with the world? But who knows. Whether it is to change or be changed, who can say for sure...