Danshan Chishui Mountain is high and deep, and Gan Tang sings Cai Hou. 1 satrap: official name, the chief executive of a state. 2 Fusang: The name of the tree in ancient mythology, where the sun rises. "Shan Hai Jing O Haidong Waijing": "There are hibiscus on the Tang Valley, and they bathe for ten days. ③ Five nights: One night is divided into five, which is called five nights. Wood analysis: Star is the second name, which is equivalent to two nights in a jump. Erya: "Analysis of the Jin of wood, between the false, Han and Jin also. "④ Danshan Chishui: it refers to Siming Mountain. Tao Teaching, Seven Trillions of Clouds by Song Zhang Junfang: "Ninety-four Mingshan Mountain, Chishui Cave in Danshan. ⑤ Gan Tang: When he was here, he asked Bonan to make a tour. He once rested under a Gan Tang tree. Later generations thought about his virtue and gave him Gan Tang. Later, he made an allusion to praise the official's achievements. Cai Hou: refers to the satrap Cai Guiyi.