Twisting with melancholy, scratching my head and thinking, the more I scratch my white hair, I can hardly insert a hairpin. Reveal the meaning of this poem.

"I stroked my white hair. It's too thin to hold a hairpin anymore "is the last two sentences of Du Fu's" Spring Hope ". The artistic conception of the poem is: the bonfire is continuous, the family letter is cut off, but the heart keeps missing relatives, and the white hair is sad. "Scratching" is an action to relieve anxiety, and a shorter "taking the hairpin again" can show the degree of anxiety. These two poems express the poet's yearning and worry about the suffering of his loved ones, and reflect the country's demise and chaos.