At present, the salute shells used by China Salute Squadron belong to the third generation vacuum loading, and the first generation is the live ammunition with the warhead removed. The second generation is sawdust bombs. The third-generation salute shells are high-tech, weighing only 2.5 kilograms, and are smart and beautiful. There is a vacuum in the shell, and no waste will be left on site, which is safe and environmentally friendly. Each cartridge case can be reused 100 times, saving energy, and the sound of guns is loud and pleasant.