When the little crow grows up, the old crow can't fly and can't find food by himself. Little crows will look for food to feed their mothers in turn. The story of crow feeding back has been passed down from generation to generation, and many people know it. To some extent, the "feedback complex" lingering in people's minds is still an important force to maintain the harmony, warmth and tranquility of society and families.
The crow feeds back means that when Xiaowu grows up, it feeds the mother Wu. This is a metaphor. People should respect their elders when they grow up.