China had managed to help Iran by making US reversed some Iran sanctions.

https://www.reuters.com/article/us-iran-nuclear-usa-sanctions-idUSKBN2BU39F

The US prepared to lift off some Iran sanctions after the Iran-China 25-year bilateral agreement.

China had managed to help Iran after Palestine.

http://sg-stock.blogspot.com/2021/04/china-is-going-to-help-palestinians.html

We can see that the US cannot impose its wills on the Middle Eastern countries when China starts to interfere in the Middle East.