This is not a couplet about where to write, but a "clever couplet" of a game between scholars. Coincidentally, it is a dialect couplet, which is read in the dialect of Zhejiang, and the first couplet is the scale: Dorami is wordy and sparse. The bottom line is the number one two three four five six seven. It sounds like this when you read it, but it means another thing in words.
there is no clear dividing line between "coincidence" and "absolute". The person who gave the question originally wanted to beat everyone with such a weird "absolute". But the people did not admit defeat, and someone really came out. This is also the reason why "absolute" and "clever connection" have been passed down from generation to generation.