Well, it most probably could be the work of some government in an attempt to steal the military tech that could be salvaged. The design of warships and submarin

Well, it most probably could be the work of some government in an attempt to steal the military tech that could be salvaged. The design of warships and submarines is invaluable. The only military with such resources to haul cargo in excess of 6440 tons in those waters is the Chinese army. Especially considering the secretiveness of the operation which would involve perhaps hundreds of individuals divers and crew both is no easy feat. This is not the work of an organized crime syndicate or burglars, nor do they have the resources to carry out an operation of this scale without getting noticed.