Seriously, its getting boring being told Russia has the power to send Europe back to the stone age. Russia doesnt have monopoly on energy.
No country can absorbe the amount of oil and gas Russia is exporting to Europe, even if Russia had the infrastructure to adjust the flow east and south insted of west. So good luck sending it to China. And what makes you think China wants to rely on russian energy? Dont you think China is taking notes while Rusia is trying to use energy to influence european contries?