Helium tanks and helium-filled tanks can be bought in wedding shops, Taobao shops, gas supply stations and chemical plants. According to relevant public information, helium, with the English name he, is colorless, odorless and nonflammable, and its content in the air is about 5.2 parts per million. Chemically inactive, usually not combined with other elements or compounds. Helium tanks and helium-filled tanks can be bought in wedding shops, Taobao shops, gas supply stations and chemical plants.