Loosen the axle nuts and slide the rear wheel forward a bit, so the chain has plenty of slack. Then take the chain in both hands, the right thumb resting on the right side of the FORMOSA link, the left hand with its thumb just to the left of it. Now pull your hands together until the head on the left rivet lines up with the hole. Now pull your right hand towards you while you push your left hand away. I think this will get the rivet off at the left side. Now repeat the same process at the other rivet, and you'll have it off.

I think that's what you have to do, anyway! Good luck with it!