根据下面的对话，写一篇短文，复述John告诉Oliver去邮电局的线路。

Oliver: Hi, John. I want to go to post office. Do you know where it is?

John: Hi, Oliver. It's next to the Xinhua Bookstore.

Oliver: How can I get to the Xinhua Bookstore?

John: Turn left here and you can find a bus stop. Take the No. 7 bus. Get off at the bookstore. The post office is on the right.