The hesitation in Old Xu's rescue efforts was interpreted by Derek as fear.
Since Old Xu's military uniform was already damaged, Derek was unaware of Old Xu's identity as a soldier.
In his view, although the opponent was formidable, when it comes to climbing high and moving low, he clearly wasn't up to the task.
After all, this isn't a skill you can learn just by brute strength; it involves techniques that take three to five years to master.
Especially for newcomers like Old Xu and his team, who have never tried climbing or parkour before.
Because of this, Derek couldn't help but worry about their "audacity".
Of course, this wasn't to say that Derek truly cared about Xu Renjie and Lei Tong's lives; he was just afraid that if something happened to them during the climb and they fell, causing the zombies in the garden to riot, how would he be able to go out in the future to find supplies? How would he continue trading with the Japanese students?
