What does the couplet right couplet 2345 left couplet 6789 mean by horizontally criticizing the north and the south?

2345 and 6789 mean lack of clothes and food. North and South are meaningless! We can't celebrate the New Year. Then the county magistrate saw it and sent clothes and objects to his family!

As one of the traditional cultures of the Han nationality, couplets, also known as couplets or couplets, are antithetical sentences written on paper, cloth or engraved on bamboo, wood and columns. The antithesis of couplets is neat and even, which is a unique artistic form of Chinese. Couplets are the treasures of China traditional culture.

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As a treasure of China traditional culture, the earliest recorded couplets appeared in the Three Kingdoms period. During the Hongwu period of the Ming Dynasty (1368- 1399), an extra-large iron cross was unearthed in Luling, Jiangxi Province, on which the year number of Sun Quan Chiwu in the Three Kingdoms period (238-250) was cast. On the iron cross, there are artistic couplets:

Spring Festival couplets are called Spring Festival couplets, funeral couplets are called elegiac couplets, and wedding couplets are called violet couplets. Couplets are a national style written by using the characteristics of Chinese characters, and generally do not need rhyme.