A plane takes part in an aerobatics performance at the 2015 China International General Aviation Convention in Pucheng county, northwest China’s Shaanxi province, Oct 16, 2015. The event will last till Oct 19. [Photo/Xinhua]

A helicopter takes part in an aerobatics performance at the 2015 China International General Aviation Convention in Pucheng county, northwest China’s Shaanxi province, Oct 16, 2015. The event will last till Oct 19. [Photo/Xinhua]

A Swedish plane takes part in an aerobatics performance at the 2015 China International General Aviation Convention in Pucheng county, northwest China’s Shaanxi province, Oct 16, 2015. The event will last till Oct 19. [Photo/Xinhua]

A Swedish plane takes part in an aerobatics performance at the 2015 China International General Aviation Convention in Pucheng county, northwest China’s Shaanxi province, Oct 16, 2015. The event will last till Oct 19. [Photo/Xinhua]

A parachuter performs at the 2015 China International General Aviation Convention in Pucheng county, northwest China’s Shaanxi province, Oct 16, 2015. The event will last till Oct 19. [Photo/Xinhua]

People take powered parachutes during a performance at the 2015 China International General Aviation Convention in Pucheng county, northwest China’s Shaanxi province, Oct 16, 2015. The event will last till Oct 19.[Photo/Xinhua]

People take powered parachutes during a performance at the 2015 China International General Aviation Convention in Pucheng county, northwest China’s Shaanxi province, Oct 16, 2015. The event will last till Oct 19.[Photo/Xinhua]

People take powered parachutes during a performance at the 2015 China International General Aviation Convention in Pucheng county, northwest China’s Shaanxi province, Oct 16, 2015. The event will last till Oct 19.[Photo/Xinhua]

People take powered parachutes during a performance at the 2015 China International General Aviation Convention in Pucheng county, northwest China’s Shaanxi province, Oct 16, 2015. The event will last till Oct 19.[Photo/Xinhua]