1, eleven lines: eleven lines are composed of eleven lines, and the number of lines can be adjusted according to the specific situation.
2. Rhyme: Eleven lines of poetry require rhyme, that is, the last word or syllable of each line of poetry should be the same or similar.
3. Rhythm: Eleven lines have a fixed rhythm, and the number of syllables in each line can be the same or different, but it needs overall coordination.