(250321) -- GUANGZHOU, March 21, 2025 (Xinhua) -- This file photo taken in October 2023 shows a TD550 coaxial unmanned helicopter taking part in a firefighting demonstration in Wuhu, east China's Anhui Province. The TD550D coaxial unmanned helicopter system has received its type certificate from the Civil Aviation Administration of China (CAAC), the first of its kind to have obtained such certification in China, its developer said on Friday.
TO GO WITH "China certifies first unmanned helicopter" (Xinhua)
