China’s GJ-21 large stealth attack drone has been spotted on flight tests this month, as the country’s first Type 076 amphibious assault ship – the vessel that will launch the drone – enters its final sea trials. The GJ-21, the naval variant of the GJ-11 stealth attack drone, first appeared at China’s Victory Day parade in September last year and has made rare public appearances since then. Computer-generated footage aired by state broadcaster CCTV in July showed how it would be launched from...