Supply shock from China?

I’m concerned that China is losing its battle against Covid. The Chinese vaccine is clearly ineffective and the government is relying on aggressive lockdowns to contain the spread of the virus. So far without much success. What if it does not gain traction? More plants and ports will be shut down. The supply of a myriad of everyday items “made in China” will dwindle and shelves here will empty. But worse than that, China cannot feed itself. We do know that China has more than half of the world inventories of grains and beans, but how long will those last, assuming they can even be distributed? The Chinese people will conclude that the Communist Party has lost the “mandate of Heaven.” The Chinese government will panic and try to distract the populace from its incompetence by…. ?