geographical differences, the theory of yin-yang \Yang, southern China northern belong to Yin, the north-south climate differences decided the diet structure in the north of the south rice, the taste of the people around also varies due to climate, humid sichuan and hunan area, and thus like eating spicy; The northern climate is dry, easy to sweat, like eating with food. Therefore, the relationship between diet and the geographical position is very close.
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