China Eastern plane's two black boxes being found
Why is the black box so important?
In the course of the development of the aviation industry, Black Boxes and Flight Accidents accidents go hand in hand.
From the offical data shows, analysis is being carried out after the site environment, and impact marks having been located and photographed.
Aviation experts are also studying and judging the possible track, posture and impact force of the aircraft when hitting the ground.
"By analyzing the data of air traffic control's radar automation system, we're trying to restore the real flight process before the crash," Aviation experts said, adding that information on the flight's passengers, luggage, cargo and mail is also being examined.