@zasad@. The reality is China or Russia cannot sanction America because it is China and Russia that will lose if they sanction America. They would be blocking themselves from much of the banking system which is controlled by people who have interests for America to succeed.
China and Russia would have sanctioned America already if they had the alliance and the power over the banking system, however, they do not have this type of power. Only America has this.
You yourself demanded that I write correctly and not confuse definitions.
America imposed sanctions against Russia, Russia imposed counter-sanctions against America. I agree that the Americans may not notice these sanctions, but these are called sanctions, which are already in effect.
If you look at the practice of all sanctions, then America continues to buy Russian uranium, and many American companies have changed their name in Russia. Shitty Coca-Cola is sold in any small store

And everything that is prohibited by sanctions, then
Yuri and others will always come to the rescue

China pretends to obey US sanctions and trades with Russia via cryptocurrencies, like many countries.
And we continue to watch this whole circus.
I don't know whether China will attack Taiwan or not, if so, then sanctions will probably be in the near future.
I have prepared some more useful information for you
about sanctions against Russia