My Bedroom Leads to Another World

Zhang Fan discovered that the door to the side bedroom of his house could lead to the "Great Zhou Dynasty" in another world, and the level of civilization in this world should be equivalent to the Sui and Tang Dynasties in ancient China. He feels that with his ability to travel between two worlds, he can definitely build a business empire in modern society and be rich enough in another world. But after a period of understanding, he found that his knowledge was a bit superficial, and the world was not as simple as it seemed.