Wang Jun Fengshui
First of all, let's talk about Feng Shui. Ancient people believed in geomantic omen, and felt that the quality of geomantic omen in a place could affect themselves and even everything in later generations. As an emperor, the choice of its capital is more related to the luck of a country and a nation, and also to the dynasty that several generations have worked hard to build, so we must choose a place with good feng shui, and the mountains in the north are high. Many strange people say that this is the gathering place of Long Mai, so many emperors will decide the location.
Secondly, it is geographical advantage. The terrain of China is high in the north and low in the south. Most of the northern terrain is mountainous plateau, commanding, easy to defend but difficult to attack. In that war-torn era, it is very important to choose a good geographical location. At that time, the main threat of the Central Plains came from nomadic forces in the north. In the north, rivers can be used as a natural barrier to resist the invasion of nomadic forces in the north, so from the tactical and strategic point of view, the north is the best place.
There are also economic problems. The Yellow River Basin is the birthplace of civilization, with fertile land and abundant water resources, which makes the north densely populated and talented, more civilized than the south. At that time, most of the economic centers were concentrated in the north, while the south was called wilderness in ancient times, which showed that the economy in the south was underdeveloped, and the rugged terrain and inconvenient transportation in the south would also cause great problems in information transmission. Thus, the north is more suitable as the imperial city.