Possible, but risky for China to do that. A dollar buying Chinese made goods, is a dollar China has to buy Russian oil products, is a dollar Russia has to pay soldiers and build more weapons to bomb whoever they're bombing. I'm in favor of global free trade, but not without limits. The U.N. Charter is more important. The non-violent multilateral institution of resolving disputes is too important. Anyone outside that arrangement is calling to past demons. And for what? What does China gain by being seen as funding Russia's war effort?