HONG KONG — An unmanned, oval-shaped craft from flying taxi maker EHang hovers, whirring noisily like a mini-helicopter over a riverside innovation zone on the outskirts of the southern Chinese business hub of Guangzhou, part of a trial of a mini-flying taxi that once might have been found only in sci-fi films.

Associated Press video producer Olivia Zhang and researcher Yu Bing in Beijing contributed to this report.

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