Yu Gong Well, also known as "Xishen Well" and "Yanjiaquan", is sweet and clear, and will not dry up after a long drought. Legend has it that during the post-Jin period, Yan Zhenren (No. Yanluozi) used this well water to clean the supernatural ginseng collected from the mountains, and the whole family took it and became immortal and ascended to heaven. This fantasy story casts a mysterious color on the ancient well, and also makes the name of "washing ginseng well" spread to this day.