Yun Chuan was not the only one who lost his family members in the hands of these survivors. They too lost their close ones because of these selfish people. Mo He's girlfriend was a police officer and was called to duty on the day when the zombies appeared.
Because his girlfriend was a kind and responsible woman, she didn't ignore the call and went to see what was wrong. But who would have thought that those who called for help would use her as a human shield? They pushed her in front of the zombie crowd and let her get killed by the mob of man-eating monsters.
Though Mo He was not on the spot, he received a detailed report from his lover's colleague. That man was filled with anger and grief as he told Mo He about how these survivors had become heartless and selfish. They were willing to do anything to survive.
Even killing someone had become the norm for them.