You Are Almost Invincible, yet You Still Call Me Master?

Shen Lian traveled through time and found that the people in Black Earth Village were illiterate. So he stayed in the village and began to teach them knowledge. Before I knew it, I had been a teacher in the village school for ten years. During this period he encountered many strange things. Villagers don't have to carry water, the buckets follow themselves... The old cow was so thirsty from plowing the field that he opened the kettle and drank... … At first he thought it was because he was dazzled and didn't pay much attention. Until one day. When he saw that the little boy in the village could spit fire from his mouth, he realized that the world was far from as simple as he imagined...