During the Eastern Jin Dynasty, Xie An, a high-ranking official, gathered his children and their cousins on a snowy winter day to discuss poetry and classics. He challenged them to compose verses describing the falling snow.

His nephew, Xie Lang, responded with the line, 'Scattering salt in the air is somewhat comparable.' However, his niece, Xie Daoyun, cleverly suggested, 'It is not unlike willow catkins rising with the wind.' Xie An burst into laughter, greatly admiring his niece's poetic genius and vivid imagery.

This story is the origin of 'Yong Xue Zhi Hui,' symbolizing remarkable literary talent and quick wit, especially in poetic composition.