Official website of Tianjin Dongxiang Special Gas Co., Ltd. shows that helium is more expensive. High purity helium is one of the most expensive gases. Although it is not comparable to xenon, an inert gas, a small bottle often costs more than 654.38 million yuan, which is really not cheap compared with other cheap industrial gases like nitrogen, hydrogen and argon.

Helium is a rare gas with the chemical formula of He, which is colorless, odorless and chemically inactive, so it is difficult to react with other substances in general.