China has launched a project to build an "island" the size of an aircraft carrier. The double semi-submersible platform will be the world's first mobile autonomous "artificial island". Completion of construction is planned for 2030. The science island, which is 138 m long and 85 m wide, will be able to move at speeds of up to 20 km/h, and will provide conditions for the work of more than 200 researchers. It will contain six laboratories designed to carry out research in various fields.