This is because the US dollar is the mainstream settlement currency in the world and is generally affected by the balance of supply and demand. However, in view of the strong financial strength of the United States, it is not ruled out that oil prices may be manipulated by Wall Street in the short term, because money is also a commodity to some extent, and the money supply will also affect oil prices. Therefore, it is basically right to say that oil production has decreased and the dollar has strengthened.
It's not quite right for the dollar to strengthen and the renminbi to weaken. Because the dollar index is a comprehensive index of the prices of various commodities and currencies against the dollar, it is not determined by a single currency. For example, the US dollar index has risen a lot this year, but the RMB is even more awesome.
As for the NDRC's adjustment of oil prices, my personal view is that the RMB is not strong enough to affect the exchange rate of the US dollar. Of course, the impact on oil prices can be ignored. However, changes in international oil prices (denominated in dollars) will definitely affect domestic oil prices.
As for the oil price adjustment of the National Development and Reform Commission, I think it is a forward-looking guidance for the government on the exchange rate issue between China and the United States.