From a human's point of view, old man sun Defeng was actually dead. Now, he was just a walking corpse without self-consciousness, a host of brain-eating insects!
However, from a biological point of view, he was not completely dead, because his body still had vital signs and could still metabolize.
From the point of view of the order Committee and the law of this era, he was indeed dead. He was a special case of death caused by parasitism by space-invading creatures, which could be treated as a living corpse of a brain-eating insect host.
It was just that the people in the small town didn't know that sun Defeng was dead.
Every morning, Xia ping 'an would watch The Living Corpse leave his courtyard and go to the garden in the middle of the street in the town to exercise with the elderly in the town. He would follow behind the aunties who were square dancing and move his hands and legs to move his body.