我没有水晶鞋所以不是公主
[wŏ méi yŏu shuĭ jīng xié suŏ yĭ bù shì gōng zhŭ]
A metaphor based on Cinderella’s story, this nickname conveys sadness because the person doesn’t have the 'glass slipper', symbolizing they don’t consider themselves special or privileged like a princess.