Hello. Huainan is orange, Huaibei is tangerine
Explanation: Orange trees in Huainan will become tangerine trees when transplanted to the north of the Huaihe River. It means that the environment has changed and the nature of things has also changed.
Source: "Yan Zi Chun Qiu·Za Xia No. 10": "Young heard it: oranges are oranges when they grow in Huainan, and they are oranges when they grow in northern Huaibei. The leaves are similar, but the taste is different. So why? Water and soil are different.
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