Southerners sometimes call peanuts 'longevity fruit'.
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culture
The peanut is associated with longevity in Chinese folk culture, partly because the plant produces over a long season and the name 长生 (long life) doubles as a blessing — peanuts often appear at weddings and birthdays.
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Dialectal/literary. The everyday word is 花生 (huāshēng); 长生果 is more common in southern dialects, recipe books, and traditional medicine writing.