OEM is original equipment manufacturer ,it is very common in leather industry especially in wallet factory.Most of wallet factories  are OEM.That is to say, the wallet company which have own brand entrusted the factory  which non brand manufacturers to produce their product like men or women wallet.Thus the brand enterprises can reduce the cost, shorten the distance,so that to seize the market.Brand enterprises to provide design parameters and technical equipment support to wallet enterprises, to meet the product quality, specifications and models and other aspects of therequest, a kind of production mode of operation to produce products with the entrusting party of trademark sale.So, brand and product separation, so that producers to focus more on production, brand operators are free from the tedious production affairs.While the focus on technology, service and brand promotion. Therefore, the running mechanism of OEM production style is in a principal-agent framework of mass customization, supply chainmanagement based on the mode of production.