Jabberwocky
Staff Sergeant
That would be a dumb move by China. And for what purpose? No matter what aid China gives to Russia the latter won't win the war, but the former will for a generation be associated with evil.
Establish some short-term Russian reliance on China and profit in the short-term by selling excess arms. Long term it weakens Russia (which remains a strategic rival to China, rather than partner), as Russia will continue to spend blood and treasure in Ukraine
Weaken the US/West in the short term by forcing Ukraine's allies to continue to supply heavy volumes of armaments.