First, the frost spring dries up, and the wind is tight and the vegetation dries up. What does that mean?

It means that the first first frost solar term is coming, and the mountain spring is almost cut off; The cold wind blew harder and the vegetation dried up.

Dry here means to lose water and dry up, and dry means to dry up dead wood. This sentence describes the desolation of autumn, which is a chilling atmosphere in autumn.

Extended data

The autumn wind gives birth to the Weihe River, and the leaves are full of Chang 'an.

Commentary: A strong autumn wind blows from the Weihe River, and leaves fall everywhere in Chang 'an, which is a bleak scene.

This poem "Autumn wind gives birth to Wei River, and leaves fall all over Chang 'an" is a famous sentence of Jia Dao, which was quoted by many famous artists in later generations.

Before Jia Dao Jinshi, he met a reclusive friend Shi in Chang 'an, the capital of Beijing. Later, Shi left Chang 'an for Fujian. Jia Dao missed him so much that he wrote two poems. This is one of them.

My friend went to Fujian by boat for a long time, and there has been no news.

Then he said that it was late autumn in Chang 'an where he lived. An autumn wind blew from the Weihe River, and the leaves fell all over Chang 'an, which was a bleak scene.

Weishui was specifically mentioned because it is just outside Chang 'an, where Fujian started. When sending friends on the same day, there was no autumn wind in Weishui; At this time, the autumn wind blows gently in Weishui, and naturally I think of my long-lost friends.