It means: Time waits for no one. In the blink of an eye, the youthful appearance turns into a head full of white hair.
From Yu Qian's poem "Silent Night Thoughts" of the Ming Dynasty: The spring breeze and autumn moon do not treat each other, and suddenly the beautiful face turns gray.
Translation: The spring wind and the autumn moon will not wait for each other. In the blink of an eye, the beautiful face of Yi Jing turns into white hair. These two poems are meant to warn people to cherish the good times of youth.
Extended information
The expression of reclusive feelings and the generous and sad style in Yu Qian's poems heralded the turn of the poetry world. At the peak of the popularity of Taige style, literati were taboo about expressing intense feelings and sad emotions, thus maintaining the grace of their creative style in order to play its prominent political role.
Yu Qian dared to plead for the people and severely punished the powerful and powerful, but was ostracized and hit. When people are officials, they cheer in front of them and support them in front of them, showing their authority. When Yu Qian is an official, he wears casual clothes and a skinny horse. Colleagues did not regard him as modest and honest, but said that he broke official rules.