Actually China do not have good relations with USA and they do not agree on any call from the USA. Because the sanctions started from USA and they called their allies to follow so China is not showing themselves as the allies of USA.
The cold hostility of the two great powers has existed for a long time between the US and China. Here, of course, China will continue to push for full power for Russia both in terms of economy, politics, and terms military weapons. Nothing more and nothing less Russia position cannot be easy for the US to subdue or easy to dictate. The US is currently only playing it safe with European countries, especially Russia, as a part of the Soviet Union, which is still a strong reason to invade to defend its sovereignty.