The train dragging tactic, due to Yan Luo's presence, is feasible.
Yan Luo would attract City-breaking Level Demons, and the demons move at varying speeds; as long as he runs far enough, he can stratify the City-breaking Level Demons into different tiers.
The most crucial part of executing this tactic is that Yan Luo must not be caught by the City-breaking Level Demons.
So as the low-level Hunters gathered at the exit of the corridor where Yan Luo was, Wu Zechuan got hold of a suspended car.
Wu Zechuan would drive together with Yan Luo, serving as bait for the train dragging tactic, while other Sequence Three Hunters are responsible for hunting the City-breaking Level Demons.
This tactic is very straightforward, without needing Wu Zechuan's particular instructions, the Hunters know what they must do.