"Goodness gracious!"
At this moment, Xiao Feng could only use these two words to express the shock within his heart.
Because the toxic fog in Shelter No. 9 during the last incident upgraded all the zombies in Yulin City, including the relatively weaker elementary school student zombies. Although weak, they now possessed the strength of second-order zombies.
If guided by An Ran, these zombies would directly become third-order zombies.
Currently, in Yulin City, An Ran could control over 20,000 zombies, including elementary and middle school students combined. Now that An Ran had reached the fifth order, he could directly control high school students.
Xiao Feng had calculated before, including high school students, there were approximately 50,000 surviving student zombies in Yulin City.
Thinking about this number, Xiao Feng couldn't help but feel excited.