Western countries that originated from marine civilization have long attached importance to the significance of the ocean. Cicero, an ancient Roman philosopher, said more than 2, years ago, "Whoever controls the ocean controls the world." Whoever controls the ocean has the ability to control maritime traffic; Whoever has the ability to control maritime traffic will control world trade; Whoever controls world trade controls the wealth of the world and thus the world itself. For hundreds of years, Portugal, Spain, the Netherlands, the United Kingdom and even the United States today's dominant forces in the world have been based on sea power.