I was very happy to learn that …
I was very delighted to hear the news that…
It is with great pleasure that I hear of your success. Please accept my warmest/heartiest congratulations(最衷心的祝贺).
Allow me to convey my congratulations on your promotion to …
How time flies! Here you are graduating from high school and planning to attend the university in the fall. Congratulations on a job well done, and good luck to you during the next four years of university.
I wish you success and fulfillment in the years ahead.
Happy New Year to you and may each succeeding year bring you greater happiness and prosperity.
