A: The winter vacation is coming, Rick.
B: I'm going to Shanghai.
A: Yes, I have been there twice.
B:
A: Sure! Shanghai is one of the biggest cities in the world. It's in the east of China.
B:
A: It's about 1, 000 kilometres from Beijing.
B: I'm going there by plane.
A: OK. Have a good trip!
B: Thanks a lot.