What does it mean to be covered with dust and fireworks between your temples and fingers?

This poem means that the face is dusty, smoky, the temples are gray and the fingers are dark.

Temples and gray fingers covered with dust and fireworks vividly depict the image of weather-beaten and hard life. "Firework color with dust on his face" describes that this person's face is covered with dust and soot, showing a color smoked by fireworks. This shows that he has been working in a hard environment for a long time, suffering from smoke and fire.

Between the Temples and Fingers further depicts the image of this person. Gray temples indicate that he is very old, while black fingers indicate that he may have engaged in a lot of physical labor, which leads to black fingers. These details describe the difficulty of his life, and also reveal his hardship and fatigue. This sentence depicts a weather-beaten and hard-living figure, showing that he has experienced many difficulties and fatigue.