A pilot and three passengers were on board when the accident happened at 4 PM yesterday in Shijiazhuang, capital of China's northern Hebei province, sate-run Xinhua news agency reported.
A witness said that the plane suddenly plunged from the sky and hit the ground.
The plane, LE-500 model with 4-5 seats, was produced by AVIC Industry Corporation of China.
More than 50 general aviation manufacturers and operators brought around 150 aircraft to the event, which was sponsored by the AVIC flight club.
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