I Start with a Cow, and I Become Stronger by Raising Cows?

[System flow, infinite flow, time-travel flow, no heroine, decisive killing] Wang Mu came to the world of cultivating immortals. His only goal here was to raise cattle and live an ordinary life. Hundreds of years later Wang Mu found out, eh? Why did my cow suddenly become a country? Hundreds of years later again Eh? Why is my cow driving? Eh? Why does my cow use a mobile phone? Eh? Why did my cow start using nuclear weapons! Eh! Where is my cow! Oh, it turned out that the spaceship left!