Climate change and the rapid development of global industry and agriculture have made the problem of lack of freshwater resources increasingly serious. According to World Bank statistics, 80% of countries and regions in the world lack fresh water for civilian and industrial use. Freshwater resources are becoming increasingly scarce, so that some coastal cities are also serious. Lack of water. The water crisis has put forward an unprecedented demand for seawater desalination. my country has more than 4.7 million square kilometers of inland seas and border seas, ranking fifth in the world, with abundant seawater resources and great development potential.