Dear Sirs,

Referring to our previous letters, we would like to remind you that up to now we have not received any news about the shipment. As the contracted time of delivery is rapidly falling due, it is imperative that you inform us of the delivery time and fax us the shipping advice without any further delay.

No doubt there must have been some reasons for the delay in shipping and we are going to extend the Letter of Credit to the end of June.

We are awaiting your early reply.

Yours sincerely,

Notes:

1. due: expected to happen, arrive, etc, at a particular time 预计的，预期的

2. imperative: extremely important or urgent 极重要的；紧急的；迫切的