Mar.28th,20xx

　　Dear honored management of ...company;

　　I am writing this letter to thank you for your trust in us and appointing us one of the suppliers for the DQ200 project. we promise here that we will provide sample before the 20th week of this year, without delaying your overall plan.

　　thank you again your trust and we are looking forward to our happy cooperation.

　　Best wish!

　　X XX