What kind of feelings does the book express?

Shuxiang: Where is the temple of the famous prime minister? It is in a pine forest near the Silk City.

The steps are dotted with green grass in spring, and birds are chirping happily under the leaves.

The third call aggravated his state affairs, and he gave his sincerity to two generations.

But before he conquered, he died, and since then the heroes have been crying on their coats.

This poem was written in the spring of the first year of Shangyuan (760). Du Fu wrote this poem when he visited Wuhou Temple in Chengdu. After the poet settled in Chengdu, he paid homage to Zhuge Liang many times, expressing deep admiration for Zhuge Liang's character, merits and achievements, and deeply regretting that Zhuge Liang's career was ultimately unsuccessful. The beginning of the poem renders a solemn environment-pine and cypress, which shows the poet the way to the "Prime Minister's Temple", which is consistent with the poet's mood of going to worship. The couplets of "green grass, birds and flowers" describe the loneliness behind Zhuge Liang, which is also the hidden expression of the greatest hero in the world. The last four sentences, lamenting Zhuge Liang's achievements, permeated with personal loss. Liu Bei attached importance to Zhuge Liang's coming out of the mountain, and the monarch attached so much importance to talents that later scholars envied him. Zhuge Liang therefore devoted himself to assisting the two dynasties and died. The fate of such a wise monarch and wise minister is a model for the wise people who are interested in loyalty to the court in later generations. While yearning for the ancients, the poet is also bitter for his own misfortune. It's a pity that Zhuge Liang died, and the poet couldn't help crying for him.