It mainly focuses on four aspects:
1. The literal meaning of the poem must be clearly explained;
2. The poet’s thoughts must be expressed clearly; (such as Du Fu's "Wen Guanjun Recaptures Henan and Hebei")
3. It is necessary to introduce the background of the poet's creation of poetry; (such as Li Bai's "Chaofa Baidi City")
4. Explain the beautiful language features of poems and sentences.
(Like the spring breeze and the green on the south bank of the river)