【正确答案】Dear Zhang Jia,
I'm so glad to learn that you'll visit us during the summer holiday. It's a long time since we last saw you. My parents and I can't wait to see you again.
I hear that you are a good swimmer and enjoy swimming very much. So it's a good choice for you to come here, because Qingdao is a seaside city. What's more, we are now living near the sea, and it's only a ten-minute walk to the beach. So we can go swimming every day. How wonderful it will be to swim in the sea on such hot summer days. I'm sure you'll enjoy every minute here.
We're looking forward to seeing you soon.
Yours,
Li Ming