是他不懂珍惜
[shì tā bù dŏng zhēn xī]
'Shi Ta Bu Dong Zhen Xi' suggests 'it's because he doesn't know how to treasure it'. This nickname implies that something valuable is being underappreciated or uncherished. It’s often a statement from someone who felt they weren't valued or appreciated enough, maybe indicating a regretful or melancholic tone towards past events or relationships.