Why didn't he die?

Late at night on the day of the incident with chamber 11 and the undersea base, in the morgue of the Guangzhou police station.

"Zhao Yu," Li Zhenzhu asked Zhao Yu seriously,"tell me, how did you disappear from the bathroom today?" Did you really crawl out? Why didn't I see you?

"Also, what did you give Lee Bencheng to eat? How could a person still be alive after holding his breath for two hours? This didn't make sense! If I didn't see it with my own eyes, I ... I ..."

"Cough cough ... Cough cough ..." All of a sudden, a cough came from the bed. Normally, it would have been frightening, but Li Zhenzhu and Zhao Yu were prepared for this, and they both looked at the bed.

Whoosh ...

The dead body on the bed sat up, and at the same time, he removed the White cloth covering his body, revealing Lee Bencheng's face.

"I don't understand either ..." Lee Bencheng turned to Zhao Yu,"I didn't wear a bulletproof vest today, and I was shot three times, so why ..."