The Classic of Mountains and Seas: My Mirror Opens a Portal to Another World!

On May Day, Ding Xiaoguo went home to clear the land and found a mirror. Thinking it looked interesting, he put it in his pocket. On his way back to the city, a car hit him, and somehow he was knocked into another world. Starting with bringing a cow from that world back to reality, Ding Xiaoguo traveled between the two worlds and gradually came to own an entire city in the other world.