17. In view of our long friendly relations and the efforts you have made in pushing the sales, we agree to change the terms of payment from L/C at sight to D/P at sight; however, this should not be taken as a precedent.

　　18. I have no alternative but to accept your terms of payment.

　　19. When should we open the L/C?

　　20. Your L/C must reach us 30 days before the date of delivery so as to enable us to make all necessary arrangements.

　　21. How long should our L/C be valid?

　　22. The L/C should be valid 30 days after the date of shipment.

　　23. Could you tell me what documents you’ll provide? 1~5}

　　24. Together with the draft, we’ll also send you a full set of bill of lading, an invoice, and an insurance policy, a certificate of origin and a certificate of inspection. I suppose that is all.

　　25. In what currency will payment by made?

　　26. We usually do business in U.S.dollars as world prices are often dollars based.