They are also shipping T54s into the AO, not new tanks. I suspect they are not sending in any elite units either. What are they saving the good stuff for, or perhaps they do not have any good stuff? I don’t know but it is something to consider.
They have to keep “the good stuff” in the East. You know that Xi is just waiting for instability for him to walk north into the resource-rich Siberia. Xi will do so to collect on debts owed and to “keep the area” stable and from from “falling under the control of the west.”
Long term, Russia is not in a good place.