Why do cities usually choose the north side of the river?

Judging from the whole history of urban construction in China, the overall difference in the number of cities on the south bank and the north bank of the river is not very big, and the previous answer has made it very clear. However, judging from the site selection of ancient urban construction, there may indeed be a tendency to build cities on the north shore. The so-called "Yang" in the title description should refer to the so-called "South Mountain and North Water are Yang". The reason why "North" is the "Yang" on both sides of the river is because the overall topography of China is high in the northwest and low in the southeast, so the south bank is more vulnerable to water erosion, and the north bank is relatively "Yin". This means that the coastline on the south bank is more likely to be concave, while the coastline on the north bank is more likely to become convex. In the process of river scouring, the curvature of the river bank will gradually increase, that is, the velocity on the side of the convex coastline is low, which leads to the outward growth of the coastline; The water flow velocity on one side of the concave coastline is high, and the coastline retreats after erosion. The increase of river bank curvature will further strengthen this effect, thus forming a cycle. Therefore, judging from the site selection of ancient urban construction in China, the north bank of the river is more stable than the south bank and more suitable for urban construction. There is a cloud in Feng Shui: "The attack is located in Rui (four tones: refers to the more stable side of the river bank. ) ",if so. ——————————————————— If there are any mistakes, please correct me!