黄卷青灯
      Explanation: Yellow paper: yellow low Shanxie with ancient books, because books means; lamp in: hair blue lighting oil lamps, lamp means. Illuminated with books. Describe the late-night studying, or the lonely life of Buddhist practice.
      Source: Lu Song, "poems off Jiannan worry" white-haired man Cang Yan bad environment, the yellow paper lamp in the hollow. "