铅笔画的世界无色素描画的轮廓无色
[qiān bĭ huà de shì jiè wú sè sù miáo huà de lún kuò wú sè]
This translates to 'In a world drawn by pencils, sketches devoid of colors have colorless outlines,' metaphorically speaking about the beauty of simplicity in art or life, free from complexity and distraction, highlighting authenticity.