【正确答案】Bank of China Beijing Branch May 20,1998 Bank A New York U.S.A. Dear sirs, Your L/C No.1234 We have received your above L/C and observed that the credit is not signed by an authorized signatory. For the sake of precaution, please confirm to us by tested telex the authenticity of the credit as soon as possible, or please send us a duly signed instrument for replacement. It comes to our attention that the dates of shipment and expiration of the credit are inversely given to be August 30 and August 15 respectively. Please correct them. If your authorized signatories have been changed, will you please send us your up-to-date specimen signature book in order to complete our file. Your cooperation will be appreciated. Yours faithfully, Wang Tong Manager Bank of China