Zhengyiguan is the place of Dan Refinery for Zhang Daoling, the ancestor of Tianshi, backed by Longhu Mountain, facing the Suxi River, which is a natural Fengshui treasure. Now Zhengyiguan is a new antique, and there are Danjing wells dug by the ancestor of Tianshi in the view. The water quality is clear and sweet, and it is a miracle to flow for thousands of years.