On March 21, the price of international crude oil futures rose sharply. The settlement price of the main contract of WTI crude oil futures in the United States was US $109.97/barrel, up US $6.88 or 6.67%; The settlement price of the main contract of Brent crude oil futures was US $111.92/barrel, up US $6.85 or 6.52%. Europe and the United States are wavering on whether to follow the United States in imposing oil sanctions on Russia, and the expected uncertainty increases; Superimposed on the previous armed attack on Saudi oil facilities by Hussein, the market focus returned to the supply risk caused by the decline of Russian oil exports.