Jiùyuàn hēijī de jīdàn shì dài qīngsè de, bèi chēngwéi wūjīdàn.
Jiuyuan black chickens lay greenish-blue eggs, often called 'black-chicken eggs'.
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Native to Xuanhan County's Jiuyuan township (旧院镇) in Dazhou, Sichuan. Registered as a national geographical indication product. Known for black plumage, black skin, and distinctive green-blue shelled eggs, prized in regional cuisine.
