The four patriotic poems or famous aphorisms that I know are as follows:

1. Since ancient times, no one has died, and his loyalty will be remembered by history. ——Wen Tianxiang "Crossing the Lingding Ocean"

Since ancient times, people have inevitably died! If you can be loyal to your country, you will still be able to shine for thousands of years after your death and leave your name in history. "Loyal heart" in the sentence refers to a red and fiery heart, for example, "blue-blooded red heart" can be used to describe a person who is loyal to the country; "history" refers to historical records, because in ancient times, writing on bamboo slips was first roasted with fire to prevent insects. At this time, the water in the bamboo slices evaporated and looked like human sweat beads, so the book was shortened to history.

2. When Wang Shibei set the Central Plains Day, he never forgot to tell Nai Weng about the family sacrifices. ——Lu You's "Showing Children"

The poet expressed his determination to regain the lost ground in a tone of eager hope, indicating that although the poet was sad, he was not desperate. The poet firmly believed that one day the Song Dynasty's army would be able to pacify the Central Plains and regain the lost territory. With this line, the tone of the poem changes from sadness to excitement.

The last sentence, with a change of mood, expressed his helplessness that he could not see the reunification of the motherland, and had no choice but to place his hope in future generations. He affectionately told his son not to forget it when paying homage to his ancestors. Telling himself the good news of "Northern Dingzhong/Yuan" expresses the poet's unswerving faith and tragic wishes, and fully embodies the aging poet's love for and service to his country.

3. I shed tears when I am grateful for the time, and I am afraid of other birds. ——Du Fu's "Spring Hope"

Flowers are heartless but tearful, birds are frightened without hatred, and flowers and birds are resentful because of people. The flowers in spring are originally delicate and bright, with charming fragrance; the birds in spring should be jumping for joy and singing euphemistic and sweet songs, bringing joy to people. "Feeling for the time" and "hate to say goodbye" all embody Du Fu's sadness, depression and pain due to the time.

4. The business girl does not know how to perish/the country hates her, and she still sings the flowers in the backyard across the river. ——Du Mu's "Place at Qinhuai"

In the graceful and light style, it shows bitter irony, deep sorrow and infinite emotion, which can be called a "swan song". These two sentences express the sober feudal intellectuals' hidden worries about the country's affairs, and also reflect that the officials and nobles are filling their decadent emptiness with a life of sensuality, singing, dancing, and extravagance. The soul, and this is the portrayal of two different aspects in the real life of the declining late/Tang Dynasty.