小美, today we're going to learn something new called 'chengyu.'

Chengyu? What's that?

A chengyu is like a little box filled with secrets. Behind each chengyu, there's a complete story, but on the surface, it's just a few short characters.

A little box! Is it like my toy box, with surprises inside when you open it?

Exactly! For example, the chengyu '对牛弹琴' is like a little box—it tells a story about playing music to a cow.

Haha, the cow definitely can't understand!

That's right. So this chengyu means it's useless to talk to someone who doesn't understand.

I get it! The little box is really fun!

You're so smart! Let's open more interesting 'chengyu boxes' together next time, okay?

Okay! I want to see what other stories are inside!