“Context” is that Xi asked Putin to wait until after the Olympics. The “negotiations” were a ruse.
Putin invaded because it is part of his oft stated desire / goal, and specifically because he thought: the West in general and the US in particular was politically weak, he could repeat past adventures, and that Ukraine would crumble in a few days.
Well, he was right about one.
The “negotiations” consisted of the US calling Putin names.
That made them a certain “ruse”.