The next generation Taigei-class submarine, the successor of the Sōryū diesel-electric attack submarines, is powered by Lithium-ion batteries. Some countries have non-nuclear subs using electricity. Instead, innovations in such systems have been practical for powering submarines.
China accomplished the launch of a hypersonic glide vehicle (HGV) that demonstrated the Asian superpower's ability to develop high technology like Mach 5+ missiles.