How to count couplets neatly?

Couplets are an independent style, which consists of two equal-length written and antithetical Chinese character sequences. In other words, there is no limit to the number of words in the upper and lower couplets, but they must be equal; The joint article is meaningful or understandable; The level and level should conform to the law and the confrontation should be neat; Couplets are independent texts, not part of other texts. Those who meet these conditions are couplets, otherwise they are not couplets.

The antithetical couplets in regular poems or parallel prose can only be called couplets if they exist independently of regular poems or parallel prose.