The title is quite clickbaity, a more appropriate title would be: “Chinese researchers publish a simulation based paper about jammers being able to reproduce the radar footprint of multiple ships”. This is TRL3-4 max. Sadly it is quite common to have media communicate papers about proofs of concept as finished technology. Really cool stuff though and I would love to read more, sadly nobody linked the paper and it is not on the Journal of Systems Engineering and Electronics webpage, so if anyone finds the DOI, please share.