Ma Xiaoyun, a graduate student at the College of Agriculture, traveled through the Tang Dynasty. He wanted to make a stable living by farming, but he discovered that the seeds in the Tang Dynasty had their own "immortal cultivation" properties. When others were growing grain, he planted spiritual plants, and when others applied fertilizer, he irrigated spiritual springs. Starting from cultivating potatoes with a yield of thousands of kilograms per mu, he used modern agricultural knowledge step by step to stir up greenery in the Tang Dynasty. Even Li Shimin wanted to worship him as his teacher to learn farming.