During the previous wait for news, Wen Wen didn't sit idle.
He used some methods to conduct a preliminary investigation inside the car factory.
One of the findings was that hidden within the outer walls of the factory was a runic array.
The primary function of this array is to conceal abnormal auras, and without prior knowledge of a problem here, even Wen Wen would not notice the existence of the array.
Without Wen Wen's expertise in runes, even a deliberate search would not reveal any issues from outside the car factory.
Apart from hiding the aura, the array on the fence also serves as an alarm; entering carelessly would inevitably be discovered immediately.
The person who set up the array on this factory wall must be a Rune Master.
To avoid alerting the enemy, Wen Wen took out a piece of special white chalk, drawing a special pattern on one side of the wall, which was also a runic array.
