Owing to unforeseen difficulties encountered by our manufacturers, we find it impossible to effect shipment before the end of this month and would appreciate you extending the shipment date and validity of your L/C to 15 th and 30 th respectively.

• 由于制造商遇到意外困难，我方无法在月底前装运。希望贵方能将信用证中的装船期和有效期分别展延到15日和30日。