From this we may well know why Chinese are fond of calling the moon by various fanciful names such as "rabbit silhouette," "rabbit shadow," and "rabbit form." Along these same lines veins we have "the golden horse of the sun," so that "the rising of the rabbit and descent of the horse" has come to mean the passing of day into night.
由此當知為什麼「兔輪」、「兔影」「兔魄」等都是月亮的別稱了，於是就像「日中金馬」一樣，玉兔也成為月亮的代表，所以「兔起烏沉」一詞就用來形容「月起日落」。