Introduction to Xu Fu: Xu Fu, also known as Junfang, was a famous alchemist in the Qin Dynasty and served as the imperial physician of Qin Shihuang. He was born in Qi State during the Warring States Period. During the Qin Shihuang period, Xu Fu led 3,000 boys and girls to cross eastward from the coast of Shandong and traveled all over southern Korea and Japan. It became a good story in the history of cultural exchanges between China, Japan and South Korea. It has been a hot topic of research and discussion for thousands of years, and it has been a hot topic for people to study and discuss for thousands of years. It has become a comprehensive multi-disciplinary study of pre-Qin history, Qin and Han history, history of Sino-foreign relations, navigation history, folklore, religion, archaeology, etc., and has extremely important academic value.