葵秋已久离人未归
[kuí qiū yĭ jiŭ lí rén wèi guī]
It reads 'the sunflower autumn has been long, but the loved ones have not returned'. A metaphorical way to express feelings about long-distance lovers. Just as the saying goes 'sunflowers turn toward the sun, waiting for it eagerly', which stands for missing someone dearly who hasn't come back yet over a prolonged time period.