If China supported Russia the war would have been over by now. There is a reason Russia has to buy weapons from North Korea and Iran when China would have been able to provide much more.

China has actually supported Saudi Arabia's war on Yemen's Houthis more than they have supported Russia's war on Ukraine. When Saudi Arabia's F-15s started getting their wings blown off by by Iranian SAMs fired by Houthis it was Chinese drones that started hitting Houthi positions in Yemen.

For some reason there is little awareness about the close Saudi-China alliance here in the West.