Factories sell to whatever export outlet will give them a high price, while export outlets only look for cheap prices when seeking suppliers. You rarely see a close customer-supplier relationship.
例如：上游織布廠看下游那家成衣廠，出價高，就把產品賣誰；下游廠商則看那家上游公司便宜，就向那家買，很少有基本顧客與供應者關係。