Dear ，
I should like this message to be taken as an expression of heartfelt gratitude to you and . If it had not been for your assistance in giving me aid and , I fear that . During the , you have given me generous help and continuous guidance by .
Thus, I really appreciate , and I hope that I may repay your kindness by .
Finally, I feel most obliged to thank you once more.
Yours sincerely,
Li Ming