=========跟单区（id,item, qty, link, price, contact)=============
跟单
id:老猫钓鱼
item: GNC Triple Strength Fish Oil 1240 （90 softgels）
qty: 3*3
link: http://www.gnc.com/product/index.jsp?productId=12077692
price: 25*3
contact: 97656839
item: GNC Triple Strength Fish Oil 1240 （90 softgels）
qty: 3*3
link: http://www.gnc.com/product/index.jsp?productId=12077692
price: 25*3
contact: 97656839
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