What does the "theme" of a poem mean?

The core of what this poem wants to express. For example, the entire poem "Song of Everlasting Sorrow" vividly describes the love tragedy between Tang Xuanzong and Yang Guifei.

1. Poetry is the general term for ancient Chinese literature and art. Poetry is the oldest and most literary form of literature. Originated from the labor chants and folk songs of ancient people, it was originally a general term for poetry and songs. In the beginning, there was no distinction between poetry and song. Poetry was combined with music and dance, collectively called poetry.

2. After the Han Dynasty, "Poetry" specifically refers to the earliest poetry collection in my country - "The Book of Songs", which has a history of more than 2,000 years, and therefore specifically refers to the form of verse as opposed to prose. . For example, the works of Qu Yuan, Li Bai, Du Fu, Bai Juyi, Lu You, Ruan Ji and others have a wide range of themes and are generally divided into ancient style poems and new style poems, such as four-character, five-character, seven-character, five-rhythm, seven-rhythm, Yuefu, interesting poems, etc. The creation of poems generally requires rhyme, antithesis and the basic requirements of origin, succession, transition and synthesis. Since modern times, it has specifically referred to freehand writing through imagery, such as hazy poetry.

3. It is a major style of literature. It requires a highly concentrated summary and reflection of social life, and is saturated with the author's rich thoughts, feelings and imagination. The language is concise and vivid, and has a certain rhythm. It is generally arranged in lines. A literary genre that reflects life and expresses emotions through rhythmic and rhymed language: poetry, poetry. The most common poems are divided into: five characters, five rhymes, seven characters, and seven rhymes (a. Comments on poets, poems, poetry schools, and works that record poets' discussions and actions; b. A kind of ancient rap art). Collection of poems, poetic dramas, poems, poets, cantos, history of poetry, poetry recitation, and the Book of Songs.