I Took My Sister to Practice Immortality in Uncle Jiu's World

[The introduction is weak, please read the text] Ye Qilang travels through the zombie world and is bound to the strongest immortal cultivation system at the beginning. As long as you slay demons and transform undead souls, you can get practice points, and the practice points can directly improve your cultivation level. With the help of the system, Ye Qilang's cultivation has improved by leaps and bounds, and he has reached the pinnacle of his life. [The writing is not good, I can only make up for it with cool writing]