=====跟单（id/item/quantity/price/link/contact)======跟单请说明
id
item
quantity
unit price
link
contact
跟一个
id：dover
item: GNC aloe vera skin gel
quantity: 2
Price: 1.99 per piece
link: http://www.drugstore.com/gnc-aloe-vera-skin-gel/qxp141191?catid=15274
contact: 93269001
item: GNC aloe vera skin gel
quantity: 2
Price: 1.99 per piece
link: http://www.drugstore.com/gnc-aloe-vera-skin-gel/qxp141191?catid=15274
contact: 93269001
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