雪窗萤几

Explanation: Analogy Diligence studying. 　　Source: "_Select_ed Works of any Kuang <Yangzhou, as recommended for the Xiao Shi table> _set_ firefly Yingxue" Lee Sun-note cited "Sun World record" Sun Kang was poor, often Yingxue reading. "" Book of Jin Yin Chuan car, "a poor family infrequently in the oil, the summer months the training capsule according to the book filled with dozens of fireflies, the night following the day to Yan. "