In the ending of the novel Earth Online, the protagonist did not die. He won the decisive battle with Feng Wu and successfully saved the Earth. As for the nano-particles in Feng Wu's hands, they were a high-tech material that could enhance the strength and toughness of objects and could be used to create various weapons and equipment. In the novel, Feng Wu's nano-particles were used to create a weapon that could control the weather, which gave his faction an important advantage.