Describing the occurrence of rain further shows the beauty of rain, in which the words "latent", "moist" and "fine" vividly describe the characteristics of rain. Rain is "good" because it is good at timing and "moistening things quietly". Spring rain usually moistens everything with breeze and drizzle. However, there are exceptions. Sometimes, it will be accompanied by cold air, from rain to snow. Sometimes, it will be accompanied by strong winds and heavy rains. Although the rain at this time is in spring, it is not a typical spring rain. It will only hurt things, and it will not "moisten things quietly." Naturally, it will not make people "happy" and it is impossible to get a "good" evaluation. Therefore, the "knowing season" of the first couplet alone is not enough to fully show the "good" of rain. It was not until the second couplet wrote a typical spring rain-accompanied by gentle rain-that the word "good" was implemented.
Delighting in Rain on a Spring Night
[Author] Du Fu
Good rain knows the season, when spring comes. Sneak into the night with the wind, moisten things silently.
The wild path is dark, and the river is bright. Look at the red and wet place, the flowers in Jinguancheng are heavy.