This is an standard appropriate response to a trap question. Confirming or denying the bait question lock down your negotiation position. The right answer is to say fuck off. This is basically what happened.
So no, refuse to provide answer does not mean yes. It can be "maybe". There is a strong argument for why "maybe" is a better option than yes.
Remember China can provide a lot of aid short of weapon support that can totally tilt the balance. Intelligence, sensor, industrial, discount civilian products, money.
Russia being helped by Chinese direct military aid greatly tarnish their brand. Considering their military industry rely on export mostly this is a very expensive option. Therefore a more invisible kind of military aid is ideal.
That said direct military aid must remain on the table. Ukraine will be compeled to negotiate if Russia could be backed up by big Chinese direct military aid. Sure it looks ugly on Russia, but Ukraine don't care. It is a life or death consideration for Ukraine, and Russia alone is already bad enough. The "maybe" here serves as a stick without consequence of using it. If China can offer a fair deal as a carrot then it is a very compelling offer for Ukraine. Evidently Zelensky is cracking at this offer.
I agree with you, but only in the current situation. If Russia, however, start losing the war, then China would probably send them weapons.
Russians would have no other choice then, well they could still do tactical nuclear strikes, but is too much of a taboo, even China would probably stop supporting Russia after that.