Er Quan is divided into upper, middle and lower pools. The upper pool is octagonal, with the best water quality, large surface swelling force, no overflow when the cup swells for several millimeters, and the water is transparent, sweet and delicious. The middle pond is square and the water quality is poor. Du Nan, Zhao Gou and Song Gaozong have all drunk spring water here, and built pavilions on the Er Quan, named "Er Quan Pavilion" and titled "The Source of Living Water". Zhao Mengfu, a calligrapher of the Yuan Dynasty, inscribed the stone carving "The Second Spring in the World". The lower pool is the largest, rectangular, chiseled in the Song Dynasty. There is a stone arrow carved by Yang Li in the 14th year of Hongzhi in Ming Dynasty (A.D. 150 1) on the wall of the pond, and the image is vigorous and simple. The spring water flows into the square pool from the hukou, making a tinkling sound. There are several Taihu stones in front of the pool, which are stacked like Guanyin standing like a fish, known as Guanyin stone in the world, with the dragon lady on the left and the good talent on the left. There are four inscriptions under the stone. The inscription is "Yan Hui". It is a relic of an ancient villa in the Ming Dynasty, which was moved here during the reign of Qing Qianlong. The Chinese character "The Second Spring in the World" on the north wall of Fangchi was written by Wang Shu, an official of the Qing Dynasty. The handwriting is vigorous, majestic and simple.
A Bing, a blind musician, used to wander around Huishan. Accompanied by the bright moon in the sky and the murmur of spring water, he was full of thoughts and unrestrained feelings, and wrote a song "Two Springs Reflecting the Moon". Music is like tears, expressing the accusation against the dark society and longing for the light, which is widely circulated at home and abroad.