Couplets should have the following characteristics: first, the number of words should be equal and the sentence breaks should be consistent; Second, be plain and harmonious; Third, the part of speech is relative and the position is the same. Generally speaking, virtual to virtual, real to real means that nouns to nouns, verbs to verbs, adjectives to adjectives, quantifiers to quantifiers, adverbs to adverbs and related words must be in the same position; Fourth, the content should be related and run through from top to bottom.
Main advantages:
Couplets originated from the symmetry of characters and sounds in China, and appeared before the Zhou Dynasty. With the development of papermaking and calligraphy, couplets have become an independent style.
Couplets are short in form and concise in words, which is not only a vivid artistic expression, but also an excellent cultural heritage. Couplets are developed on the basis of ancient "Fu Tao" and "antithesis". The earliest Spring Festival couplets in China appeared more than 1000 years ago.