After Tomorrow: I'm Just a Newbie Passing By

[No system + no time travel + plot direction] My name is Liu Xiaoyu, and I am a survivor... So to speak. Three years after the infection broke out, I was trapped in this city for three years, dealing with infected people every day, but I lost my hand because of a radio. I was scratched, but I didn't tell anyone because word came over the radio that the human base area had anti-infective drugs. So my three companions and I set out on the road out of the city. I didn't expect that I was the only one who arrived at Happy 101. So many things happened in the process, and as I explored the outside world, some secrets were gradually unearthed. Special infectious agent? Heimdall's experiment on controlled infected people? And... My origins? The outside world is so exciting that my memory gradually begins to get confused. The virus mother did not wake up Liu Dayu in the nest of the infected, there is no city in the distance of Hope Valley, and there are genetic locks that cannot be unlocked. Is everything that happened to me and experienced false? "But... Where is she? She said she would cook something for me when I come back." "Back." I slowly turned my head and my neck made a popping sound, but I saw Rachel crying and pulling the trigger hard.