Please talk about why China is north and south in terms of topography, climate, dryness and wetness.

Traditionally, it is from south to north.

The south is humid, warm and hilly, which is suitable for planting rice.

The north is dry and cold, with many plains, which is suitable for growing wheat.

In fact, the area that produces the most daily edible rice is the northeast, and it is more delicious than the southern rice. This is because the sunshine time in the northeast is long and the temperature difference between day and night is large.

Therefore, the significance of the existence of northern Mi Nan is mainly people's living habits.

In addition, ps: Northeasters basically eat rice and rarely eat noodles. The provinces that eat the most noodles are: Shandong, Henan, Hebei and Shanxi.