Ordinary investors want to invest in crude oil, but generally can't directly buy crude oil products. Can only invest in financial products related to crude oil. For example, financial products such as crude oil funds, crude oil products of banks or crude oil futures can be selected by investors according to their preferences.

crude oil funds can be purchased through direct sales channels of crude oil fund companies or through sales platforms of banks, securities companies and other third-party funds; Bank's crude oil products can only be traded through banks; Crude oil futures can only be traded through futures companies.