中国沿海之广阔海域,自古以来就是中国沿海各族居民不断经营、开发、探察和防卫的国家疆域。东海与朝鲜、日本、琉球等国之海域毗连;南海与交趾、林邑、吕宋、苏禄、文莱、爪哇等国之海域毗连。由于各国社会文明程度和生产技术水平之差异,历史沿革的不同,以及受自然地理环境的制约,自然而然地决定了各自的生活地域与生产活动范围和特定的生存空间。仅就中国而论,由于中国海岸线长,大陆地理位置优越,在广阔海域之内有众多海山岛屿和天然的海上通道所连结紧密的海山岛链,为中国沿海渔民和军民商务业人等从事捕鱼、经商、航海、巡海,以及远洋探险等活动,提供了最良好的自然条件,亦为国人开阔地理视野,扩展地理发现的地域范围,向海外传播华夏文明而由大自然设定了种种良 The vast sea area along China’s coast has been the national territory of the residents of all ethnic groups living in the coastal areas of China continuously operating, developing, exploring and defending since ancient times. The East China Sea and North Korea, Japan, Ryukyu and other countries adjacent to the sea; the South China Sea and Cochin, Linyi, Lu Song, Sulu, Brunei, Java and other countries adjacent to the sea. Due to the differences in the level of social civilization and production technology in different countries, the differences in historical evolution and the constraints imposed by the natural and geographical environment, they naturally determine the scope of their living areas and productive activities and their specific living space. As far as China is concerned, due to its long coastline of China and the mainland’s advantageous geographical position, there are a large number of seamounts and islands linked by seamounts and natural maritime passages within the vast area of ​​sea. Catches up with fishermen and military and civilian business people in China’s coastal areas. It provides the best natural conditions for fish, business, navigation, patrolling the ocean and expeditionary activities. It also broadens the geographic horizons of Chinese people, expands the geographic range of geographical discoveries, and spreads Chinese civilization to overseas countries. good