A black box recovered after the China Eastern Airlines flight MU5735 crashed in south China on Monday is believed to be the passenger plane's cockpit voice recorder, an aviation official told a press briefing on Wednesday night. The Boeing 737-800 aircraft's crash happened Monday afternoon on its way to south China's Guangzhou from southwestern Kunming. It nose-dived above Tengxian County in Wuzhou City in Guangxi Zhuang Autonomous Region, about an hour after the takeoff. On board were 132 people - 123 passengers and nine crew members. The crew were all in good health, according to investigators. So far, no survivors have been found. Here are some key facts about the plane crash.