Give it a gift and give it a pear in return. What does it say?

The original sentence is to return the peach to the plum, which means that he gave me a peach and I gave him a plum in return.

This idiom comes from the Book of Songs, "Give me a peach and a plum. He is a boy with horns, a real rainbow boy. " , referred to as "return the favor".

Example: It is inevitable that we should not regard what happened in Xiu De as a virtue, but learn from others.