Where is the beauty of classical Chinese of Yang Guifei's son?

When he saw Yangmei, he thought of the child's surname, but Yang's son was not stumped. He thought of a peacock named Junping Kong. Even better, Yang's son didn't give a blunt answer, but took a negative way and showed due courtesy. He expressed the meaning that "Peacock is not your bird, Myrica rubra is my fruit", and his tactfully answer left Junping Kong speechless. This is enough to show that children are quick-thinking and witty and humorous in language.