Mike：Hi, I’m Mike. I’m from the United States.

Boy：Welcome to our class, Mike. We’re happy to meet you.

Mike：Can you tell me a bit more about China?

Girl：Sure! Did you know that China is one of the oldest countries in the world? It’s over 5,000 years old.

Mike：Yes, I did. It’s much older than my country—in fact, the United States is one of the youngest countries in the world. It’s not even 300 years old.

Boy：And China is bigger than the United States.

Girl：Yes, and it’s the biggest country in Asia. We also have some famous rivers. The Yangtze River is the longest river in Asia. It’s about 6,300 kilometers long.

Mike：Wow! I didn’t know that. I thought the Yellow River was longer.

Boy：No, the Yellow River is 5,464 kilometers long. But both rivers are very important to China.