The obvious beneficiaries are the Ukrainians. It makes it hard for the rissians to promise to turn on those taps and forces the Germans to make a one-way shift away from such a deep dependence on Russian gas.
There is no reason for the Russians to do this. I suppose some Baltic state might have some incentive, to keep the Germans from wavering, but I’m not sure any of them have the capability or willingness to take such a risk.
And China? What could they gain?