你说我是2b我又不是铅笔
[nĭ shuō wŏ shì 2b wŏ yòu bù shì qiān bĭ]
Translated as: 'You said I'm 2b (a common graphite pencil grade), but I'm not a pencil.' It carries a light-hearted self-deprecating humor implying even when considered dumb ('2b') there is more depth and complexity beyond what meets the eye.