根据题目说明写一封催证函，要求用英文书写

Oct.28,2009
Dear Joe Brown,
We are pleased to inform you that you have signed back sales contract NO.CTC5682 with us.AndI would draw your attention to the fact that the factory producing plan has a full schedule nearly two months,but we still have not received your covering L/C.We request you to open the relevant L/C immediately,so that we can ship the goods in time.We look forward to receiving your covering L/C soon.
Yours Sincerely,
Nanjing Dechuangweiye Import & Export Co., Ltd
Cathy Lee