What rhetorical devices did Chen Tao, a poet in Longxi, use in this poem?

"Five thousand sable brocade mourning Chen Hu" is metonymic, and the poem "sable brocade" refers to soldiers. There are also exaggerated techniques. Five thousand soldiers died in the battlefield, writing the image of soldiers bravely serving the country. "Pity the bones by the river or the people in the boudoir dream", and compare "no bones" with "people in the boudoir dream"