Requirements for the issuer to invest in the joint venture model: complete and controllable trade chain, the amount of certificates (which can be opened in batches, and opened immediately after the arrival and settlement of the goods) the theory of 25 million U.S. dollars to start (the first test order can be smaller), the requirements of the unit price of the product should be high, there is no quota restriction, can be freely developed in the market, the upstream and downstream have a fixed object of cooperation, and do not accept drifting orders. The upstream can accept SBLC payment, and the downstream has the ability to sign and pay. When you see the loading order, you have to pay in advance or give a deposit. The issuer has double-header to control the property right to participate in the settlement. The profit of each order can not be more than 10%. Only after the above conditions are met can we discuss the mature trade logic closed loop.