Dear Hoa,
After leaving the countryside, I have decided to write this letter to you. We haven't seen each other for a long time, right? First of all, let me send my regards to you and your family for my stay.
I still remember clearly what we did together in the countryside. Especially when we walked along the rice fields at harvest time, lay on the grass and looked at the blue sky. We told each other many interesting jokes and forget about the busy work. Every time I think back to those memories, I really wish to visit you again sometime. If you don't mind, I hope we can meet at the coffee opposite my house. Remember to give me your answer soon.
Love,
Ba