He uses the machine to destroy major oil production facilities through the world, crippling China's and the rest of the world's oil supply in a matter of weeks. He then uses this shortage to make an offer to supply China all the oil it needs.
Using a device, he destroys key oil production centers worldwide, causing a global oil crisis that cripples both China and the rest of the world in just a few weeks.  He subsequently offers to supply China with all its oil needs.