青灯黄卷

Explanation: Green fluorescent light an oil lamp and the paper yellowed books. Studied by means impoverished life. 　　Source: Yuan Ye Biao "Shushe cold light" yellow paper with a longer poem green lamp lights, the flowers of silver incense blunt midnight. "Yuan Guan Hanqing" worship the Moon, "the fourth folded yellow paper you both love green lamp lights, but not random and change." 　　Examples: A Decade of ~, Ying Zhan window bitter mien. ★ Minglan Ling Xiao Xiao Sheng, "Jin Ping Mei," the thirty-sixth back