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An unmanned fixed-wing aircraft completed a delivery task over the sea from Shanghai to Shengsi Island in east China's Zhejiang province on May 29, thepaper.cn reported on June 24.

The U650 amphibious seaplane, carrying a full load of mail, landed smoothly in the waters of Shengsi Island after traveling 110 kilometers in 52 minutes.

It took the drone producer, UVS Intelligence System based in Shanghai, and the client, China Post, about half a year to apply for approval from air traffic management authorities for the flight.

The drone maker said it plans to carry out more trial flights with its domestic clients to make sure that the delivery service is extendable to other islands in the Hangzhou Bay area.