Strange poems, strange poems, really strange. Guess the riddle in this poem. Children, read the following poem and have a look. What did you find?

The sky is not big, it is a.

There are no people in the sky, but two.

Uncle Wang has gone. It's already three o'clock.

There is no truth, it is four.

I have no mouth, it is five.

Yan Wuyun, it's six.

Cuttless cutting is seven.

The cave has no roof, it is eight.

The enemy is gone. It's nine.

There are ten needles without gold.