Why is this poem by Si Kongshu the best?

And the yellow leaves fall in the rain, just like the fate of the white-haired old man under the light. Two beautiful antitheses, without using a word of autumn, express their sadness about autumn very strongly.

The best artistic conception in a poem is not imposed on readers by the author, but gradually permeates between the lines. As raindrops brighten the yellow leaves, the first object the reader sees is rain, so a rainy scene begins to appear in the reader's mind. Next, the tree appears in our mind. On closer inspection, it turned out to be a yellow tree. It turned out to be autumn. What will the yellow leaves look like in the rain? Obviously, leaves only drift faster when it rains. Next, the lamp illuminates my bald head. What is a lamp, what is a person, and what is an irrational person? Reading? Doing things? I don't think you are playing. The same pain, it is easy to evoke the reader's deep heart.

The people in the window are old, and the tree in front of the door is already autumn. These two sentences are the same thing as what he said, but in contrast, what Wei said is completely plain and thin.

As for Xiaobai's two sentences, they are not as good as Xiao Wei's. More mechanical.