"Sen" Sentence in Classical Poetry

Du Fu's "Shu Xiang";

Where is the Shuxiang Ancestral Hall? In a pine forest near the Silk City.

The steps are dotted with green grass in spring, and birds are chirping happily under the leaves.

Worried about what is happening in the world, he gave his heart to two generations.

But before he conquered, he died, and since then the heroes have been crying on their coats.