凉心姑娘凉生凉忆薄心少年薄情薄义
[liáng xīn gū niáng liáng shēng liáng yì bó xīn shăo nián bó qíng bó yì]
Refers to cold-hearted individuals, both young man and girl who have indifferent feelings towards others. They tend to remember less emotionally involved situations, emphasizing their apathy or lack of affection for people around them.