The origin of the name of Suzhou Sangtian Island is: it is named after a Chinese idiom "Sangtian in the sea of ????mulberry fields". This idiom comes from "The Legend of Immortals·Magu" by Ge Hong of the Eastern Jin Dynasty. Ge Hong recorded in "The Legend of Immortals" that a fairy named Magu said that since she became a fairy, she had seen the East China Sea turn into mulberry fields three times. Later, the vicissitudes of life were used to describe the great changes in the world. This is the origin of the name of Suzhou Sangtian Island.