Look! Someone is celebrating his birthday.
This must be his 21st birthday. No doubt about it.
Why? Do you know that guy?
No. Well, in America, 21 is the age when you're allowed to drink. So, many guys celebrate it in bars.
That's interesting. But it would be really expensive, I suppose. Just think about all the drinks.
No. If it's your birthday, then you don't need to pay a cent. Just blow out the candles and open the gifts. That makes the birthday a special day. Your friends will take care of everything.
Wow. That's wonderful.
What about in China? What'd you do to celebrate your birthday?