阅读下面的电子邮件,回答问题: Dear Sirs, We thank you for your letter of May 3 and shall be glad to enter into business relations with you. We have seen your brochure and are interested in Green Tea Extract and Porcelain Tea Set No.TSM001. We shall be pleased if you will kindly send us samples and all the necessary information regarding these two products. Meanwhile, please quote us the lowest price, CIF Liverpool, stating the earliest date of shipment and the minimum quantity. Should your price be competitive and date of shipment acceptable, we intend to place a large order with you. Your early reply will be highly appreciated. Yours faithfully Gavin 1、这是进口商还是出口商写的? 2、他们要买卖的是什么产品? 3、写信人希望对方做什么?