But plans can't keep up with changes. Shortly after the apocalypse arrived, communication completely broke down, and she hadn't yet created the secret code. Even if she created the secret code now, there would be no way to communicate it to others. So the plan fell through.
Qu Shilin, however, did not completely give up on creating the secret code. Whenever she had free time, she would study it. After all, she couldn't kill zombies nor conduct research all the time, and she needed something to occupy herself; otherwise, she feared falling into total despair about the world.
Creating a reasonable secret code wasn't easy; she put in a lot of effort and finally succeeded in creating it three days ago. It was now in the phase of patching and refinement.
But she didn't even have the chance to formally use the secret code before she saw it in the zombie virus serum formula!
