The present invention relates to a rich man (헬 子) injecting helium gas, characterized by a low specific gravity is enhanced buoyancy.;The rich man made of conventional styrofoam has a lot of problems such as good buoyancy but low strength and polluting coastal fisheries as it breaks down.;The present invention improves this point, the grooves 40 and the holes 50 are formed in the outer skin of the body 20 of the plastic container 10 using the nanocomposite material, and helium gas is injected into the inner space 30. After sealing, the groove 40 and the hole 50 is configured to be used to tie a string, characterized in that buoyancy is enhanced by helium gas lighter than air.;This product enhances buoyancy of rich people, prevents environmental pollution, and when used in place of styrofoam, it is installed in aquaculture farms of marine products such as seaweed, oysters, and sea squirts to improve fishery productivity and prevent marine pollution. The economic and environmental effects are very large.
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