First there's no evidence Russia actually wants anything. At one point they were claiming Putin called up Xi to ask him for a shipment of MRE meals. Do leaders have time to talk about things like that? I think a squadron or two of WL-2s would make the Russian job easier, but he seems content fighting this war Soviet style, even it'll take longer.
Secondly, say if China agrees to American demands and Xi publically/privately announces that it won't sell military equipment to Putin, do you think they will stop there? They certainly won't. Next they will ask China to put pressure on Putin not to target certain bases, or use certain munitions for example. Or they'll ask China to pressure Russia to cede on some points in negotiations. The phone calls won't end. They'll use the same arguments and threats as have been with this.
The only correct position is the current one. China is neutral in this conflict, but it is none of America's business who China buys or sells things to. America will try and threaten China to either openly pick a side (Russia), or try to use China to attack Russia indirectly. This isn't colonial times anymore, and America is in no position to demand anything from China. This is a European mess America created, it's their job to clean it up.
If Biden wants Putin to do something he should pick up a phone and ask him, not beg or threaten China like a jealous ex girlfriend.
