What does it mean that the rain in the sky is crisp and crisp, and the grass is close at hand but there is nothing?

"The rain in Tianjie is crisp, but the grass color is far away." Meaning:

It's drizzling, and the wet streets in Beijing look as smooth and wet as crisp.

The grass is green from a distance, but you can't see patches of green (only a few sparse trees) when you look closely.

"Tianjie" refers to the streets of Beijing, at the foot of the Emperor.

"Runru Crisp" is an ancient dessert snack.

This poem comes from "Early Spring is Eighteen Members of the Ministry of Water Affairs" by the Tang Dynasty poet Han Yu. The whole poem is as follows:

Early Spring in the Capital: Arriving at Zhangji

Author: Han Yunian: Tang

The rain in Tianjie is as slippery as crisp,

The color of the grass is close in the distance, but not at all.

The biggest advantage is that one spring,

It's better than the smoke willow in the imperial city.