the legendary fairy grass. It can shine at night. "Ode to Huayang" by Liang Tao Hongjing in the Southern Dynasties: "Yingzhi can be a candle at night, and Tianquan can taste the dust." Yuan Zhangyu and Li Xiaoguang's "snuff Couplet": "Every inch of grass is small, and Dan Parrui is double."