=========跟单区（id,item, qty, link, price, contact)=============
跟两样，但都是buy one get one @50%
ID: shuang_r
Item: GNC Herbal Plus® Standardized Bilberry Plus Lutein, 60 Vegetarian Capsules
Quantity: 2
Link: http://www.gnc.com/product/index.jsp?productId=4258056#
Price: 26.99
Contact: 91283616
ID: shuang_r
Item: GNC SuperFoods Apple Cider Complete, 90 Vegetarian Tablets
Quantity: 2
Link: http://www.gnc.com/product/index.jsp?productId=13014252
Price: 15.99
Contact: 91283616
Item: GNC Herbal Plus® Standardized Bilberry Plus Lutein, 60 Vegetarian Capsules
Quantity: 2
Link: http://www.gnc.com/product/index.jsp?productId=4258056#
Price: 26.99
Contact: 91283616
ID: shuang_r
Item: GNC SuperFoods Apple Cider Complete, 90 Vegetarian Tablets
Quantity: 2
Link: http://www.gnc.com/product/index.jsp?productId=13014252
Price: 15.99
Contact: 91283616
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