2. Crude oil investment, namely oil investment, is an important investment project in the world. Domestic individuals mainly participate in crude oil investment through cooperation with institutional members of oil exchanges. There are four main investment methods in the world: spot investment, futures investment, futures indexed investment and energy stock investment; At present, China mainly supports spot investment. Oil spot trading started late in China and is considered as one of the most promising industries. Most domestic oil exchanges only support the traditional spot trading mode, and many domestic exchanges have been able to realize spot trading of oil.