Enlightenment to other chain enterprises: purchase goods directly from the factory, shorten the supply chain and reduce procurement. Cost is the purchasing principle of Wal-Mart. No matter where you go to Wal-Mart in the world,/low price every day is the most striking sign. One of the important guarantees for Wal-Mart to implement "low price every day" is to bypass the middlemen, shorten the supply chain, save the cost of the supply chain and purchase goods directly from the factory. After the uniformly ordered goods are sent to the distribution center, the distribution center will screen and repackage the goods on the spot according to the needs of each branch. This approach, similar to zero inventory of online retailers, can save Wal-Mart millions of dollars in storage costs every year.