' drooping' and' surging' in Du Fu's a night abroad are poetic eyes. " (The First Draft of the History of China Literature) Most of the classical poems in China are limited by the number of words and sentences, so the ancients paid special attention to the choice of words and sentences when writing poems and lyrics, striving to achieve the effect of vivid words. The so-called "poetic eye" is what makes the whole sentence Youlong fly and make people sit up and take notice.
For example, Song Qi's "The branches of red apricots are noisy in spring" and Zhang Xian's "Clouds break the moon and flowers make shadows
", which are two well-known poems. The scenery written was originally plain, but
the word "noisy" and "funny" made the whole poem full of interest and full of realm.