==========跟单区(id, item, link, qty, price, contact) ====
跟单
id: wwjaustin
item: GNC B-Complex Big 150 100 Vegetarian Caplets
link: http://www.gnc.com/product/index.jsp?productId=16513126
qty: 3
price:$7.596 (after discount)
contact：你有的~
item: GNC B-Complex Big 150 100 Vegetarian Caplets
link: http://www.gnc.com/product/index.jsp?productId=16513126
qty: 3
price:$7.596 (after discount)
contact：你有的~
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