In this poem, "endless grass on the grassland" and "four seasons come and go" have a pair of synonyms.

Ancient road-desert city

Fontaine.

Say goodbye to the ancient grassland

Author: Bai Juyi era: Tang Dynasty

The long grass is so lush that the withered grass will thicken the color of the grass every autumn and winter.

Wildfire can't burn it out, but the spring breeze can revive it.

Weeds and wild flowers are all over the ancient road, and the end of the grass in the sun is your journey.

I once again sent my bosom friend, and the thick grass represented my deep affection.