Russia and China have been long time allies and share the United States as their mortal enemy. I am aware that FR Putinists, who have a short memory span, think Russia and China working together is a new thing, but it is actually very old.
Putin has nothing to fear from a fellow totalitarian terror regime. China would never do something so stupid as attack Russia, which they need if they ever want to fight and win WW3.
The soviets and Chinese fought quite a few border skirmishes.. And were a few times in bed with each other against the Americans due to the commie thang. But Russia is no longer a commie country ( though some freepers continue to think so). U.S policy, if it really is interested in heading off Chinese domination, should be focused on driving a wedge bewteen Russia and China. Not pushing Russia even further into China’s orbit