Homesickness is so thin, how can the next couplet be right?

Homesickness is a thin poem, and the second couplet misses you silently. Couplets require neat sentences, equal words, cohesion from top to bottom, and matching phonology and relative parts of speech. In Homesickness, the homesickness of the first part corresponds to the yearning of the second part, the homesickness of the first part corresponds to the third part of the second part, and the homesickness of the first part corresponds to the seclusion of the second part. It can be seen that the third part of the second part corresponds to five characteristics: neat sentence meaning, equal number of words, cohesion from top to bottom, phonological matching and relative part of speech. So homesickness is a little thin, and the second couplet is silent about missing three points.