Dear Sirs, We are in receipt of your letter dated March 20. For the purpose of assisting you to recommend our products to your clients as early as possible, we agree to your proposal to advance the initial shipment for 1/3(one third) of the total quantity from May to June. The remaining 2/3(two thirds) will be shipped during July. With regard to your request for alteration of the port of destination from Hamburg to Oslo, we wish to say that direct-sailing vessels from here to Oslo are, at present, few and far between, and the transshipment charges in other ports are currently very high. For the sake of avoiding any possible delay and extra expenses caused by transshipment, it is hoped, therefore, that you will comply with original agreement for destination. Your prompt cable reply will be appreciated. Yours sincerely, China National Imp. & Exp. Corp. What's the author's purpose for this letter? To inform. the client about the shipment of their ______.