=========跟单区（id,item, qty, link, price, contact)=============
跟单
item1: Nature's Way, Ginkgold Eyes, 60 Tablets
link:http://www.iherb.com/Nature-s-Way-Ginkgold-Eyes-60-Tablets/1989
qty:1
price:$21.41
item2: Natural Factors, Lycopene, 10 mg, 60 Softgels
link: http://www.iherb.com/Natural-Factors-Lycopene-10-mg-60-Softgels/2577?at=0
qty: 1
price:$14.97
link:http://www.iherb.com/Nature-s-Way-Ginkgold-Eyes-60-Tablets/1989
qty:1
price:$21.41
item2: Natural Factors, Lycopene, 10 mg, 60 Softgels
link: http://www.iherb.com/Natural-Factors-Lycopene-10-mg-60-Softgels/2577?at=0
qty: 1
price:$14.97
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