That twitter post is 99.99% fake and fabrication. It is another information warfare by the west in the very same manner of China's "genocide". It does not worth any logical debate.
See
#12,034 for why I just call it a fake.
You are probably right. Nonetheless I do think the point is worth making: the outcome that China most wishes to avoid here is the collapse of the present Russian regime. Out of the chaos of regime change, China could potentially lose a formidable and useful ally and, in the worst-case scenario, find itself facing a formidable and troublesome foe.
This goes to the discussion about potential Chinese assistance to Russia. Ukraine is unimportant. A Russian victory, Russian defeat, grinding insurgency, stalemate, all of these things are more or less European problems. The threat is not military and does not call for a military response, or military aid. Russia's strategic goals in Ukraine are ultimately Russia's, not China's, and must be correlated with Russian resources and commitments (the failure of the government in Kyiv to similarly shape its policies according to the real-world distributions of power is precisely what has led them to the present catastrophe!). The risks to the present regime in Russia are the political implications of crippling western sanctions (in the months and years ahead) coupled with the political implications of military losses and failures. By refusing to engage with the western sanctions regime, China will be providing a far more useful service to Russia than any conceivable military aid, while minimising the blowback in terms of relations with European nations, not least of all because there are a
of states that are opting not to engage in economic warfare against Russia, most significantly including Anglo-darling India.