Rice refers to rice and flour refers to wheat flour. Before the reform and opening up, this staple food was aristocratic diet, which ordinary people could not afford. The south refers to the Yangtze River basin and its south area, and the north refers to the Yellow River basin. Now the south refers to the south of Huaihe River, and the north refers to the north of Huaihe River, including the northwest and northeast.
The staple food we are talking about today mainly includes two processing forms of rice flour, rice, wheat, corn, highland barley, buckwheat, sorghum and millet.
The relationship with geography is mainly reflected in: climate is the main factor affecting grain production; There is also the height of the dimension, the height of the altitude, and again, the influence of the terrain.