What if a lifebuoy could fly to save a life? Combining a drone with a lifebuoy, this smart rescue device can quickly reach people in distress in the water and precisely drop a flotation aid, buying precious time for rescue teams. Already deployed at Hangzhou's West Lake, it's among 81 smart policing devices showcased at the 2026 World Internet Conference Light of Internet Expo in Wuzhen, east China's Zhejiang Province. See how technology is making water rescues faster and more efficient!