Using a vivid sentence to express the number "0" is a rhetorical device of metaphor or personification.

(1) Don't let the word "0" wander around, let it have a "home" to enter and a "home" to return to.

(2) Big round eyes with the word "O", looking forward to returning to the mother's arms.

(3) "O" eyes are big and round, and I look forward to returning to my home.

(4) The homeless "O" is looking forward to living with his brother and sister.