Including:
1, flat and even appear alternately in this sentence.
2. Even words exist in duality. For example, "Jinsha River is warm in the clouds and cliffs, and Dadu Bridge is cold in the hurdles." The levels of these two poems are "levels and levels, levels and levels, levels and levels".
The couplets demand levelness and harmony. The traditional habit is to "pucker up and fall flat", that is, the end of the last sentence of the first couplet is puckered up and the end of the last sentence of the second couplet is flat.
The method of couplets:
First, words should be equivalent and sentences should be consistent. In addition to deliberately leaving a place for a word to achieve a certain effect, the number of words in the upper and lower couplets must be the same, neither more nor less.
Second, we should be straightforward and harmonious. The traditional habit is to curl up and fall flat, that is, curl up at the end of the last sentence and curl up at the end of the last sentence.