Big if true. But no evidence is provided. There would be no reason to "weigh sanctions" if Chinese banks already stopped helping Russia.

I tracked some citations back to an Izvestia article. Seems pretty real.

That being said, China could just be starting to apply their Iran model to Russia - designating a few small regional banks with no USD exposure to be receiving houses for Rubles. Those banks inevitably get sanctioned but they shrug and keep doing what they're doing. Once the money is inside China, it's very difficult for the US to keep track of it.