They are in the process of cutting us off. They are disgusted with having the US be the leader of the world. China and Russia and OPEC view themselves as the rightful leaders of the world.We've had this discussion before but if America were to cut off china, it would hurt us worse and it will hurt them. That's why China is basically untouchable and can get away with anything
It will hurt China too which is why they will make sure they get all their Christmas sales in first, but in the end the US is only 5% of the world's population and they can be replaced.
If China can seize control of the reserve currency they'll survive, the only thing they want from the US is our agricultural production.
As to Griner China, Russia and the Islamic countries do not have a drug problem anywhere even close to the scale of the problem in the US. They would never take advice from you or anyone in the US on how they should "improve".