感谢信
Dear ___，
On behalf of ___, I would like to extend our most sincere gratitude for ___. We appreciate greatly your aid in not only___, but also ___.
It is said that your ____ that we could enjoy such a wonderful trip / arrive at such splendid achievements, and we will never forget your painstaking labor and full cooperation / warm hospitality.
With this letter we would also like to formally invite you to___, so that ___. WE look forwards to hosting you ___ .
With personal regards.
Yours sincerely,
Wang Lin
