Introduction to the Three Immortal Palaces: It is said that in the early years, there was a large paddy field on the Tianping of Yucang Mountain. The owner of the land was the old rich man Zhu Shengxin. Because of his family's decline, he sold the paddy field to the new rich man Lan Chenghe. Lan Chenghe's long-term worker Lei Zhenchun accidentally dug out a vat of silver while working in the fields and gave it to Lan Chenghe. Lan Chenghe in turn gave it to the old rich man Zhu Shengxin. Because none of the three wanted the silver, they took it with them. Bai Yin went to the county hall to let the county magistrate make a decision, and finally obeyed the magistrate's decision and gave it to others to build bridges and roads. Because of their beautiful characters, the Jade Emperor named them both Jade Cang Immortals.