Beneath Lishan there was a white fox. It startled and bothered the people below the peak, but they were unable to get rid of it. One day during the Tang Ganfu era (874-80 CE), it suddenly took a bath in a hot spring. Before long, clouds arose and mists bubbled up, and a violent wind began to blow. It transformed into a white dragon, ascended the clouds and departed. For some time afterwards there was dark and gloom, and people frequently saw the white dragon soaring over the mountain’s flanks. This continued for three years. Then an old man appeared, approaching each night and weeping before the peak. After several days people waited for him and asked him why. The old man said: “My Fox-Dragon is dead. That is the reason.” They asked him why he called it a fox-dragon, and again why he wept. The old man said: “The fox-dragon was a fox and became a dragon. After three years it died. I am the fox-dragon’s son.” The people questioned him again, asking: “How can a fox turn into a dragon?” The old man replied: “This fox grew endowed with the vital energy of the west, its whiskers white in colour. It did not travel with the crowds, did not join with its vicinity. The fox was entrusted with the skirts of Lishan for more than a thousand years. Later, it happened to unite with a female dragon. The heavens were aware of this, and so decreed it become a dragon, and also that, like a human, it could leave the mortal plane and become a sage.” When he had finished speaking he vanished.
Li Fang 李昉, et al., Taiping guangji 太平廣記 (Extensive Gleanings from the Era of Great Harmony), 10 vols (Beijing: Zhonghua shuju, 1961), x, 455.3718: