What emotions do ancient poems mainly express?

From the vast sky, the sharp wind apes are sobbing, the birds are flying home in the clear lake, the white sand leaves are falling like the waves of a waterfall, and I watch the long river always roll forward. I have come three thousand miles away. With the sadness of autumn and my hundred years of sorrow, I climbed this height alone, and the bad luck laid a biting frost on my temples. Heartache and fatigue were the thick dust in my wine. This poem was written in the autumn of the second year of Tang Daizong Dali. Poets in Kuizhou, Chung Yeung Festival, climb high and overlook, bleak autumn colors aroused the feelings of wandering life. The first four sentences describe the scenery, and the last four sentences express emotions. But the scene is actually one. The first sentence, such as the sky, the deep valley mourns the apes, is thrilling, which makes the whole poem shrouded in a sad atmosphere. The second sentence is said gently, which makes people feel a kind of quiet desolation, empty melancholy and lonely sadness. This empty and cold world makes three or four sentences full of Vientiane and mixed feelings. Boundless is rich and complicated. The "rolling Yangtze River" is endless, and this kind of "coming" shows the eternity of time and the infinity of space in the universe, as well as the eternal wonder, shock and understanding of human beings in the face of natural laws. Leaves fall like the spray of a waterfall, which certainly makes human beings feel small and helpless in front of nature, but I always watch the long river roll forward, often arousing people's lives and showing them a never-ending enterprising spirit. This poem is full of sadness, which makes people taste a feeling of sadness and see a feeling of great courage. Thus, the following four sentences have the same aesthetic spirit: I came from three thousand miles away. Sadness now and autumn is a kind of sadness and enterprising; With my hundred years of sorrow, I climbed this height alone, which is the indomitable struggle of the unfortunate for fate; Difficulties and hardships, poverty and sorrow, jade is rough and abrasive. The poet's life journey is bumpy, unfortunate, desolate and sad, which makes people unbearable to see, but his indomitable progress also makes people burst into tears. Depressed life is heavy and sad, but it is also rich, profound and powerful. All four verses of this poem are correct, and so are the first two sentences. This writing method has always been concerned by critics. For example, corals on the seabed are indescribably thin and unfathomable, but they are completely clean and powerful. There were no predecessors in the past and no knowledge in the future. Du Fu's poems say something, not the ears of Tang poetry. However, this poem should be the first of the seven-character poems in ancient and modern times, and the seven-character poems in the Tang Dynasty are not necessarily the first. Du Shi Jing Quan: "Tall and muddy."