If you wanted to write a letter to the adoptive parents of a child you cared for before her adoption, what would you say?

When I was in China, I helped raise $ and became quite close with a beautiful young baby. I funded a surgery to repair her cleft palate through 2 surgeries, and she grew to become more and more beautiful. After I left, she was adopted, and it has taken me over a year to find her again.

Her new parents have been unresponsive to an email sent by a third party in an attempt to introduce my previous presence in her life and get us connected. But they could have had the wrong email, etc, or just not be willing to talk.

Regardless, I have done some research and have found out where they live, or so I think.

I want to write them a letter. Any ideas/advice on how to approach it?

Thanks so much :)