集萤映雪

Explanation: _Set_ firefly: Jin Yin car came from a poor family in the summer fireflies lighting equipment bag to practice reading; Yingxue: Jin Sun Kang Chang Yingxue winter reading. Described his family was poor, hard studying. 　　Source: Southern Liang Ren Fang "as recommended Yangzhou Shi Xiao Table": "not only his pen for the support, also owns the book into the school, is _set_ to Ying Ying-Xue, Liu compiled Po series."