A joke about Bao Gong's face

My son especially likes watching Bao Gong's TV series. Once, his mother deliberately asked him, "Do you know why Bao Gong's face is so black?"

The son thought about it, patted his head and shouted, "Mom, I know. Isn't there a moon on Bao Gong's forehead?" The moon only comes out at night, so Bao Gong's face is so black!

My son especially likes watching Bao Gong's TV series. Once, his mother deliberately asked him: Do you know why Bao Gong's face is so black? The son thought about it, patted his head and said, mom, I know. Isn't there a moon on Bao Gong's forehead? The moon only comes out at night, so Bao Gong's face is so black!