China Eastern 5735 crashes into mountain in China

On March 21st, 2022, China Eastern flight 5735 was making a regular domestic flight from Kunming to Guangzhou, China. It was cruising at an altitude of 29,000 feet until it made an abrupt descent into the earth. It crashed into a remote hillside, causing a forest fire in the nearby area.
As soon as the crash occurred at around 1 P.M. local time, the Chinese authorities immediately scrambled teams to help put out the fires and look for any victims that may have survived. But out of the 132 people on board the aircraft, none survived.
The aircraft involved was a 7 year old Boeing 737-800 delivered to China Eastern in June of 2015 by Boeing. The 737 involved was a Next Generation (NG) model. Not to be confused with the recent 737 MAXs that was grounded worldwide due to stabilizer problems. The 737 NG was a workhouse plane, developed in the late 1990’s. With nearly 5000 737 NGs built, it has suffered from 22 hull losses. Meaning the aircraft was damaged beyond repair. With these statistics, the 737 NG was a relatively safe plane.
There have been many speculations on what happened in the cockpit of flight 5735. A common theory is that one of the pilots may have committed murder/suicide. This has happened to GermanWings 9525, a flight from Barcelona, Spain to Dusseldorf, Germany in which the first officer deliberately crashed the plane killing all on board.
The black boxes have been found. The National Transportation Safety Board (NTSB), have been assisting the Chinese authorities in finding out why flight 5735 crashed. The flight data recorder and cockpit voice recorder is currently being analyzed at NTSB headquarters in Washington DC. It may take upwards of years to figure out what happened, but as for now it is under investigation.