=========跟单区（id,item, qty, link, price, contact)=============
跟单，谢谢
id: liukaisi,
item: GNC Women's Prenatal Formula with Iron,
qty: 2,
link: productId=3334258
price: 9.99,
contact: 90097951
item: GNC Women's Prenatal Formula with Iron,
qty: 2,
link: productId=3334258
price: 9.99,
contact: 90097951
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