What does it mean to say that there was once a steamed stuffed bun sleepy in Joy and Big Big Wolf?

Happiness and Big Big Wolf said that once a steamed stuffed bun was hungry (not sleepy):

It was Ollie who told the joke to Boiling Sheep at that time, and Boiling Sheep didn't understand the joke at that time. But when it was warm enough to make steamed buns for him the next day, Boiling Sheep finally understood the meaning of the joke.

Boiling sheep and lazy sheep also told this joke. Lazy sheep didn't understand the meaning until they gave a sheep a steamed stuffed bun.

Character: Brief introduction of steamed stuffed bun

Steamed bread is a character in Pleasant Goat and Big Big Wolf, which appeared in episode 436. He is the son of Lord Bao.

After a whim, the role has been cancelled.

trait

Steamed bread-there is a star on your forehead.

Dad-there is a moon on his forehead.

Mom-there's a flower on the hat.