========跟单区（id,item, qty, link, price, contact)=======
跟单
id: 囧在国大
item: GNC Calcimate Complete 120 Caplets
link: http://www.gnc.com/product/index.jsp?productId=11127253
qty: 2
price: 14.99 (buy 1 get 1)
item: GNC Mega Men 50 Plus 60 Caplets
link: http://www.gnc.com/product/index.jsp?productId=4033438
qty: 2
price: 23.99 (buy 1 get 1)
contact: 85901601
item: GNC Calcimate Complete 120 Caplets
link: http://www.gnc.com/product/index.jsp?productId=11127253
qty: 2
price: 14.99 (buy 1 get 1)
item: GNC Mega Men 50 Plus 60 Caplets
link: http://www.gnc.com/product/index.jsp?productId=4033438
qty: 2
price: 23.99 (buy 1 get 1)
contact: 85901601
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