1. China has made remarkable achievements in the exploitation of submarine oil and gas, exploration and evaluation of deep-sea mineral resources, mariculture, submarine tunnels, artificial islands at sea and other aspects of marine space utilization. 2. Ocean development refers to the activities of resource development and space utilization of the ocean and its surrounding environment (atmosphere, coast, seabed, etc.). ).) Through ocean development, human beings have transformed the potential value of the ocean into actual value, creating conditions for human survival and development. According to the nature of marine resources and marine environment, marine development activities can be divided into marine biological resources development, seabed mineral resources development, seawater chemical resources development, marine renewable energy development, marine space utilization and marine environmental protection.