Why should the map be artificially defined as upper north, lower south, left west, right east?

Statement 1: Generally speaking, the north pole of the globe is above and the south pole is below. A part cut from the globe, placed horizontally, becomes a regional map of a certain area. The top of the map is close to the North Pole, and the bottom of the map is close to the South Pole, that is, "upper north and lower south". Then we gently move the globe on the table and make it rotate from west to east. At this time, the movement of the earth turns from left (west) to right (east), so the direction on the map is naturally "left west right east". Statement 2: In ancient China, before the Southern Song Dynasty, the political and economic development in the north was relatively developed, and the south was still a land of barbarians. Almost all emperors built their capitals in the north, so there was a saying that the north was respected. And then naturally say you're wandering around.

Statement 3: The direction of the emperor's seat always faces south. You should have heard the idiom of southern courtiers! The north is the emperor, high above; The south is a courtier, bowing to its knees.

Besides, we China people live in the northern hemisphere, but the ancients didn't think so. In their minds, China is the center of the world, and that's how China's "China" came from. Whether the sun they see during the day rises or sets in the west, it is always in the south of us. At night, they look at the stars and look up at the Big Dipper, a symbol of the emperor. In this way, "going north and going south" also echoes the living habits of ordinary people.

In a word, the explanation of going to the north and going to the south cannot be summarized by one reason, because it is a habit recognized by emperors, generals and ordinary people, and it is better from the aspects of geography, economy, politics, psychology and history.