The term"sea"in ancient texts holds dual significance.One aspect refers to the actual bodies of water,while the other denotes extremely distant locations.Leveraging these dual meanings,Shan Hai Jing,in conjunction with the geographical understanding of its era,delineated a more comprehensive layout of the overseas world.It subsequently became a source of inspiration for the Da Kyushu theory and the Five-Service system.Concurrently,the overseas imagination wielded a profound influence on the Kyushu-Four Seas-Four Desert-World View.