Linguistic Features of Du Fu's Poems

1. Fight cleanly. Congju vs. Lonely Boat (relative to things), Erkai vs. Yi Series (relative to numbers), Tears Another Day vs. Hometown Heart (relative to things).

2. Pun: The word "Kai" is a pun, which means that the chrysanthemum blooms and the tears follow.

This is an extremely important metrical poem of Du Fu, which embodies Du Fu's pursuit of "being lonely for human nature, not dying without surprising words".