What kind of thoughts and feelings does this poem by Prime Minister Shu express?

Prime Minister of Shu

Du Fu [Tang Dynasty]

Where can I find the ancestral hall of the Prime Minister? There is a lot of people outside Jinguan City.

The green grass reflects the spring color on the steps, and the oriole sounds good in the sky through the leaves.

Three visits to trouble the world, two dynasties to open the hearts of old ministers.

He died before leaving the army, which made the hero burst into tears.

This poem is divided into two parts. The first four sentences pay homage to the Prime Minister's ancestral hall, feeling the reality from the description of the scenery, revealing the poet's concern for the country and the people; the last four sentences praise the Prime Minister's talents and virtues, and recall the history from The memory of the ancestors also contains many of the poet's expectations and longing for the destiny of the motherland. The whole poem has profound meaning and far-reaching sustenance, creating a deep and sad artistic conception. In summary, this Qilu poem is a very simple poem, but it has a large capacity and a high degree of summary power. In just fifty-six words, it tells the whole life of Zhuge Liang and presents Zhuge Liang, who has been famous throughout the ages, in front of readers. When future generations of patriots and ordinary readers recited this poem, their admiration for Zhuge Liang arose spontaneously. Especially when I read the two sentences "Died before leaving the army, which makes the hero burst into tears", I couldn't help but shed tears.

In terms of artistic expression, questions and answers are set up, reality is used to describe fiction, scenes are blended, narratives are combined, the structure is continuous and complex, and the layers are wavering. It also has the charm of language with refined words and sentences and harmonious tones, which makes people Singing and sighing three times, the aftertaste is endless. Du's poems are said to be "depressing and frustrating", and "The Prime Minister of Shu" is a typical representative.

This poem expresses praise for Zhuge Liang's heroic talents and loyal service to the country by visiting historical sites, as well as his regret that he died before he succeeded in his mission.