=========跟单区（id,item, qty, link, price, contact)=============
跟单买二送二！
Item: GNC Women's Ultra Mega 50 Plus （120 Caplets）
Quantity：4 (buy 2 get 2 free)
Link: http://www.gnc.com/product/index.jsp?productId=4033458
Price: $39.99 per item
Contact: 97801854
Quantity：4 (buy 2 get 2 free)
Link: http://www.gnc.com/product/index.jsp?productId=4033458
Price: $39.99 per item
Contact: 97801854
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