What do Wang Bo mean by the third and fourth sentences on the ninth day?

The third and fourth sentences of Wang Bo's ninth day mean that he is tired of all kinds of sadness living in the south. I don't think he can go back to the north. Why does Hongyan come from the north?

Original text:

Jiuri

Author: Wang Bo

Dynasty: Tang Dynasty

On September 9, at Wangxiangtai, he sat in a farewell cup. ?

Human feelings are tired and bitter in the south, and Hongyan is from the north.

Translation:

I was particularly worried when I went back to my hometown to see the Double Ninth Festival, set the table to see my friends off, and raised my glass.

I'm tired of all kinds of sadness in the south. I don't think I can go back to the north. Why does Hongyan come from the north?

Extended data:

Write a sentence or two in a crisp autumn, beginning with a pleasing autumn scenery. In autumn, the sky is high and wide, and the blue is like washing. White clouds are floating in the blue sky. Sometimes they are separated, sometimes they are connected, sometimes they are like clouds of cotton balls, and sometimes they are like rolling waves. The earth in autumn is bright and refreshing.

I saw the peaks of pines and cypresses towering into the sky, the calm river flowing endlessly, and the water and mountains complement each other, forming a beautiful picture. The poet climbed the mountain with a pot and drank as much as he could, enjoying chrysanthemums while drinking.

The poet climbed the mountain on Chongyang alone, and through the description of what he saw and felt, he expressed his political frustration and lack of talent for many years. Finally, he sang alone, expressing his natural and open mind.