白日不懂夜的黑
[bái rì bù dŏng yè de hēi]
'Day doesn't understand the darkness of the night.' This name expresses that there is an unbridgeable gap in understanding between two opposite sides, just as day does not comprehend the loneliness and sorrow that can be experienced during the long nights. This often reflects on interpersonal relationships and empathy towards others' pain or experiences.