Meanwhile, the investigation into the Zhan Family's accident was still underway, but based on the evidence found, it had been tentatively established that this was an act of intentional retaliation.
It was possible that someone tampered with the elevator during maintenance, such that if the elevator doors stayed open on a high floor for a certain period of time, there was a chance of wearing down the equipment that prevents the elevator from falling. Once worn down to a certain degree, it would naturally collapse.
Moreover, the person who did this probably didn't expect to almost catch everyone in one fell swoop; it was indiscriminate revenge, likely intending that no matter who fell and lost their life, it would affect the Zhan Family.
It was just unexpected that the elevator stayed open for so long, yet everyone outside was distracted by something else, and not a single person went in.