With wal-mart's purchasing patterns, so that we know to the supplier and the retailer is a kind of information sharing, mutual reciprocity and mutual benefit, mutual cooperation strategic cooperative relations, rather than just buying and selling relationship. The strategic cooperative relations, make wal-mart can always the first to get the most want to see the goods on the market, while other retailers are waiting for the shipper of product catalog or contract negotiations, wal-mart's shelves already the product sell like hot cakes.