According to legend, in the era of the Yellow Emperor, there was a minister of music, known as "Linglun" in history. Proficient in music theory, set the twelve rhythms, known as the originator of Chinese music; later to Yuzhang, living in seclusion in the western mountains, medicine and alchemy, known as "Mr. Hongyi". Mr. Hongyi collected medicines and pounded them in the mountains, and then drew good water to make the elixir. In order to obtain good water, Mr. Hongya cut five wells in the mountain stream at the dragon pool. This is the "Hongya Cave" and "Hongya Danjing" origin now in the mountain stream on the stone wall there are many rock carvings, the most striking is the Qing Dynasty Kangxi chen year (1676) laughs at the Hall of White Book "Hongya The most notable is the Qing dynasty Kangxi chen year (1676) laughs at the white book "Hongya" two big son, although after more than three hundred years, but the handwriting is still clearly recognizable. According to 〈Xishan Zhi〉 records, in the Hongya Cave "hole side, waterfall spring shape such as jade curtains, Ouyang Xiu Pin for the eighth".

Mr. Hongyi pounding medicine alchemy, not afraid of hard work, regardless of the day and night, regardless of the year, straight to the top of the West Mountain incense and mist filled, the mountain rock a Dan red. West Mountain water, West Mountain soil, by the rich fragrance of the elixir penetration of the special sweet, a square garden of two or three hundred miles of the West Mountain, has become a mountain of immortality. Mr. Hongyi ascended to immortality, and his alchemy and water "Hongyi" victory has been recounted. During the reign of Emperor Wen of Sui Dynasty, the court changed the name to Hongya Danjing because of the fame of Hongya.