What are the poems like stars?

The moon set behind an abandoned fortress, leaving a cluster on an ancient gate; New moon and autumn dew, stars mixed with night cream. After the moon falls on the castle, the stars fall on the old gate, which is the work of the Tang Dynasty poet Sikong Shu. In the first half of this poem, the poet first recalled that when the An Shi Rebellion broke out, he fled to the south with his friends. Then write that after the war was settled, a friend returned to the north and the poet saw him off; After that, suppose that during this long time, everyone has white hair in the process of moving from one place to another. After the war, his hometown was devastated, leaving only green hills. In the second half of the poem, he imagines his friends walking early and stopping late all the way, and returning to their hometown, only to see the cold birds and hay. The poet wrote the meaning of saying goodbye to friends, and expressed the grief of breaking the old country in a tortuous way. The crescent moon, the autumn dew and the starry night cream come from Guangxu's "Double Ninth Night Collection Lanlingju and Xuanshangren Couplet".