=========跟单区（id,item, qty, link, price, contact)=============数量请写买二送二以后的数量
还可以跟单吗？
跟单，id：nxnus
1, item: GNC Calcimate Plus 800 120 Caplets,
qty: 2+2
link:http://www.gnc.com/product/index.jsp?productId=11127254
price: $12.99x2
2,
GNC Triple Lecithin 1200
90 Softgel Capsules
qty:2+2
link:http://www.gnc.com/product/index.jsp?productId=2133422&cp=3593185.12961328.2108456
price;$12.99x2
contact: 98957610, clementi
1, item: GNC Calcimate Plus 800 120 Caplets,
qty: 2+2
link:http://www.gnc.com/product/index.jsp?productId=11127254
price: $12.99x2
2,
GNC Triple Lecithin 1200
90 Softgel Capsules
qty:2+2
link:http://www.gnc.com/product/index.jsp?productId=2133422&cp=3593185.12961328.2108456
price;$12.99x2
contact: 98957610, clementi
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