Bottom line: butterflies in the forest look for flowers.
Couplets vary in length, only one or two words are short; It can be hundreds of words long. There are various forms of couplets, such as pairs, pairs, flowing pairs, couplets, set sentence pairs and so on.
Extended data:
Difference and application between ancient leveling and modern leveling;
The difference between 1 and gold is simple. One or two tones are flat, and three or four tones are awkward.
2. The leveling of ancient tones is more complicated, starting with ancient tones. There were four tones in ancient times: the flat tone is the flat tone in the flat tone, and the three tones of the flat tone are collectively called the flat tone. Among them, divide yin and yang equally, that is, level and rising tone. To put it simply, the modern tone is flat, the second is rising tone, the third is rising tone and the fourth is falling tone. There is no entering tone in Mandarin today.
3. Today, when writing couplets, you can use both the current tone and the ancient tone, but you can't mix them in the same couplet.