无情薄义好少年
[wú qíng bó yì hăo shăo nián]
'无情薄义好少年' (wu qing bo yi hao shao nian) translates to 'A young man devoid of emotions and righteousness.' It describes a person (often a youth) who lacks empathy, affection, and moral principles, hence behaving in a cold-blooded way.