They can break into one of Rossi’s facilities, or conduct computer espionage.
***It is likely that more nations than China are keying up to do just that.
Rossi should have either filed for a patent or kept everything totally secret.
***He was doing exactly that until about 2 years ago. It was Focardi who pushed him to do the demos, because he’s in ill health and wanted the credit due to him. So, Rossi obliged. He did a crappy job of it. His instinct is to keep it a secret, so everything he did on these demos went against his instinct.
But if this whole thing is a con, it is the greatest con in the history of science, and Rossi is the best demo artist of all time. No other magician can do his magic trick without being on the stage manipulating things. I don’t have such a high opinion of Rossi. He’s a mediocre demonstrator, an undisciplined scientist, and perhaps just an Edisonian inventor who got lucky.
Regardless of the reason, if his sauce is real the Chinese already have it. He may as well file a patent at this point, or get a big industrial partner.