迟茶枯萎凉茶苦涩
[chí chá kū wĕi liáng chá kŭ sè]
'The delayed tea wilts while iced tea tastes bitter' poetically portrays regret and melancholy associated with missed opportunities like late blooming affection that didn’t get properly nurtured before withering or having sweet memories become bitter as time progresses without fulfilling these aspirations.