Both designs are tailless, meaning they do not have vertical stabilisers to help maintain control. Such aircraft are typically kept stable by computers that interpret the pilot's control inputs.
The larger of the two designs is roughly diamond-shaped, with three air intakes for its engines - two alongside the fuselage and one on top - an extremely unusual configuration. The smaller one has a more conventional layout.
Both lack 90-degree angles typical of stealth shaping, which is designed to reduce radar detection.
As China modernises its military, the designs "show the willingness of China's aviation industry to experiment and innovate", said Dr Euan Graham, a senior analyst at the Australian Strategic Policy Institute.
"Whatever the merits or demerits, it appears to be a highly original design," he said. "They deserve kudos for that, and should shake off any lingering complacency that the US and its allies always set the pace."
China's Defence Ministry did not immediately respond to a request for comment.
Denne historien er fra December 28, 2024-utgaven av The Straits Times.
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Denne historien er fra December 28, 2024-utgaven av The Straits Times.
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