I think more important than any immediate assistance is China providing the means by which Russia can sustainably prosecute its war. Russia is transitioning to a war economy and I expect the percentage of GDP Russia spends on defense this year will substantially increase. China can do much to help this transition along, like provide construction equipment for new plants, the CNC machines that go into those plants, and sophisticated articles like semiconductors that Russia can't produce for itself. This is already happening to some degree, but I'd like to see it increase dramatically.
There are two problems with direct assistance (three actually - taking America's hallucinations seriously being the third): First and foremost, it draws down China's own stocks which goes against a primary interest in this war, namely drawing down NATO's stocks. Second, it goes against China's diplomatic stand for peace and against NATO's role in this war. Yes, China's diplomatic statements should be taken seriously and China condemning certain behaviours means it won't behave similarly.