What is the function of the first sentence of Wei 1 in autumn night?

In the first two sentences, the overlapping words "Tintin" and "Dragon" are used respectively. The former describes the sound of water leakage, while the latter describes the shape change of light clouds. On the surface, the description of the length of autumn night is actually to secretly compare the length of time that women miss their husbands in boudoir. The heroine in this article is troubled by her husband's long journey. The timed clepsydra sounded the sound of "Tintin" dripping in the quiet night, drop by drop, as if they were beating her heart. She listened, counted and thought anxiously, "What a long night!" She looked bored at the sky, the endless light clouds in the sky moved slowly, and the moon was sometimes covered and sometimes exposed. What Sifu saw and heard during her insomnia all provoked and aggravated her sad and lonely mood, and wrote the characteristics of a long, silent and cold autumn night.

Autumn serenade

Dynasty: Tang Dynasty

Author: Wang Wei

Original text:

At the beginning of the month, the moon rises, the autumn tea is thin, and the thin silk gown does not change clothes.

The long night is full of affectionate silver, guarding the empty room with fear and jealousy, and can't bear to sleep.