铅笔画的画在美终究是灰色
[qiān bĭ huà de huà zài mĕi zhōng jiū shì huī sè]
This phrase, which means 'No matter how beautiful a pencil drawing is, it ultimately remains grey,' reflects on art forms (specifically pencil drawings). Even though they can be visually striking and detailed, the limitation lies in their monochromatic nature, possibly also reflecting the idea that something can seem perfect yet still be incomplete due to certain boundaries.