What is Du Fu's poem praising the teacher?

Du Fu praised the teacher's poem as "sneaking into the night with the wind, moistening things silently" and described the teacher's obscure and subtle cultivation of him. From Delighting in Rain on a Spring Night, the poet uses personification to describe the spring rain, which is subtle, delicate and vivid.

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.

This poem describes in detail the characteristics of Chengdu spring rain and the scene of rainy night with great joy, and enthusiastically eulogizes the timely and moist spring rain. The whole poem is elegant in artistic conception, quiet in meaning and integrated with painting. This is a poem about rain, with vivid and unique charm.