匡衡凿壁

Explanation: "Xijing" Volume II: "Kuangheng, Gui Zhi word. Diligent no candle, candle neighbor and failure, its value is introduced through the wall of light, to reflect the light while reading the book." After "Kuangheng chisel wall "To read the Code of hard reality. 　　Source: "Xijing" Volume Kuangheng, Gui Zhi word. Diligence no candle, candle neighbor and failure, its value is introduced through the wall of light, to reflect the light while reading the book. " 　　Examples: Ergonomics ~ meaning, a small hole in the wall cavity, housing and he _set_ light irradiating the room. ★ Qing Li Yu, "study room wall of Xian Qing Ou Ji"