1, assuming that your product has its own brand, you should produce the test report and the underwriting certificate of the insurance company, indicating that the product is reliable; 2. The other party has a fixed supplier, so you should emphasize the difference between your products and the other party, such as different grades and different profits. The worst plan is to use consignment; I'll call you if the other party needs it-perfunctory, and the worst plan is to use consignment.