The Chinese are attempting to implement the Emdrive, a hypothetical propulsion system derided by many scientists as a perpetual motion machine that doesn't account for conservation of momentum. Check out the designers' FAQ and description of how it works and, and then read why people think it won't.
Conceived by Roger Shawyer, the drive is under development at the Northwestern Polytechnical University in X'ian. And if it does work? Fuel-free satellites and other spacecraft is the hook: something China is very much interested in.
Perhaps there should be a sort of "Mr. Yuk" or "Smokey the Bear" for scientists, so they know not to lick or set fire to the wrong things. "Mr. Thermodynamics," doesn't quite have the right ring to it.
Chinese Say They're Building 'Impossible' Space Drive [Danger Room]