What does the first frost mean by its deep yearning for autumn?

From Liu Changqing, No.9, North Building of Li Mingfu.

On the ninth day, I looked up, gray and far away, and the tree was very low. On barren lakes and grasslands, in the west of Cui Shan County.

The first frost is full of sound, and autumn is full of thoughts. Free white wine, brought by Ling Tao.

"The first frost is full of sound, and the autumn is deep and charming." It means: when the first frost comes, the cry of Hongyan sounds sadder, and the wanderers living abroad miss their hometown more in this late autumn!