With the Qinling Mountains and Huaihe River as the boundary, the climate difference between north and south is still great. In midsummer, the temperature in the north is very high, but there is relatively little rain, while there will be plum rain in most parts of the south. The north is hot and dry, and the south is hot and humid. Due to the different climate, summer evil is immersed in the human body, which is easy to cause "summer heat" in the north, while it is mostly "summer heat" in the south. "Summer heat" in the north, eat more fruits. If you use diet to regulate your body, both the north and the south need to get rid of summer heat, but the nuances are different. In the relatively dry northern region, Chinese medicine believes that "summer heat" will hurt "body fluid", causing fatigue, dry mouth, dry skin and other symptoms. Therefore, northerners should cope with the "summer heat", add more water, and the diet should be based on nourishing yin and promoting fluid production. You can eat more fruits that nourish yin and promote fluid production, such as watermelon, pear and raisin. In addition, northern families can cook porridge with chrysanthemum, mung bean, lily and reed root, which can also play the role of clearing heat and nourishing yin. In addition to "summer dampness" in the south, the phenomenon of "summer dampness" in the south is more serious. Hot and humid weather is easy to cause physical dysfunction, which usually interferes with the normal work of the stomach and spleen. At this time, it is best to strengthen the spleen, clear away heat and eliminate dampness. You can eat more melon and lentils, or you can cook porridge with lotus leaves, coix seed and dried tangerine peel. Some tropical fruits, such as litchi, longan, mango, durian, etc., are the most typical fruits that cause damp heat and should not be eaten more. Southerners try not to eat violent food in summer, which is easy to hurt their spleen. Southerners love to drink herbal tea with heat-clearing effect made of various Chinese herbal medicines in summer, but drinking too much is easy to hurt the spleen, so people with spleen deficiency try to drink less herbal tea in summer. In addition, regardless of the north and south, Chinese medicine believes that high temperature in summer will consume gas, so for people with qi deficiency, it is recommended to eat a little American ginseng. Moreover, try to eat less greasy fried food in summer. Some nuts with shells, such as melon seeds and pistachios, should also be in moderation.