Dear Lan,

We are about to celebrate a small birthday party for my little sister this Sunday evening. My family and I would be really excited if you could join us.

The party will take place at 8 p.m. at my house. We plan to invite some of our friends who we used to study with when we were in secondary school. This is a great opportunity for all of us to gather after such a long time of no talking and sharing. I hope we will have a good time together. Please come to join the interesting games and activities with us. We will have the party with lots of food and drink such as cakes, candies, and fruit juices which are your favorite.

It will be absolutely cheerful if you can come, Lan. Please let me know at your earliest convenience.

Love,
Ha.