凉人不知良人悲
[liáng rén bù zhī liáng rén bēi]
'凉人不知良人悲' translates to 'A cool/indifferent person doesn't understand the good-hearted one’s sorrow', expressing sadness over unappreciated kindness or true feelings in a relationship. It can indicate someone feeling misunderstood by an insensitive other.