"Agu, what is the outside world like?"
"Outside... There is a blue sky, white clouds, red flowers, and flying crows."
"Take me out and take a look."
"Okay."
....
"Agu, why are all the things you said gone? The sky is black, not white or red, and there is nothing that can fly, not even a human being?"
"Master, it's night now. It's dark all around, so of course you can't see anything. As for people, everyone has gone back to their houses to sleep. But look, there is a bright white crescent moon in the sky, how beautiful it is!"
"Oh! This is the moon, so big and white!" The child smiled happily, his eyes narrowed into a crescent moon.
The crisp children's voice is still in my ears, and the innocence of the child is no longer there. However, a long, long time later, A Gu will still be amused by the ignorant child's words that day, and he still clearly remembers that night when there were only two children, the moon was crescent, the moon was crescent.