Júzi de guǒpí shàigān hòu cúnfàng jǐ nián, jiù chéng le chénpí.
Tangerine peel that is sun-dried and stored for a few years becomes chenpi, aged tangerine peel.
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usage
Older street litter bins in China are often labeled 果皮箱 "fruit-peel box". In botany 果皮 is the pericarp, the whole wall of the fruit around the seeds, and many dried peels are used in Chinese medicine.
