China unveiled some of its most advanced military technology, including robot dogs and an AI-enabled underwater system that can neutralise mines, at a defence expo. Autonomous underwater vehicles designed to be launched by submarine were one of the most noteworthy products that featured at the 2026 Chengdu Defence Technology Industry Expo in mid-April. The vessels, which can be launched from 260mm or 533mm torpedo tubes, are mainly designed to conduct high-precision deep-ocean surveys and seabed