Following the Saudi output cuts, US crude oil prices rose 2.4 percent to $73.47 per barrel and the Brent crude futures advanced 3 percent to $79 per barrel.
China's foreign exchange reserves have been rising steadily since 1997, from 15 percent of the gross domestic product around that time to more than 40 percent currently.
Russia's seaborne crude oil exports stood at 3.5 million barrels per day in the first quarter of 2023, compared with 3.35 million barrels in the same quarter a year ago.
Data shows that New Delhi and Beijing bought a record amount of crude oil from Russia after the western ban on buying seaborne Russian crude came into effect.