Gu Chengyu suspected that the sound of the signal arrow just now was a signal from that faction. Prince Gong never intended to attack Wujun Prefecture; sending over a hundred thousand troops was merely a façade to conceal his true objective of attacking Huadong Prefecture.
This explains why Liu Meng was stalling under the watchtower, delaying any action—it was to wait for developments on the other side, merely putting on a show.
Huadong Prefecture is situated to the east of Zifeng Prefecture, adjacent to Wujun Prefecture. However, Huadong Prefecture is much larger than Wujun Prefecture, and its defenses on the watchtower are much sturdier.
The city gates are not just floodgates; the height of the gates is incomparable to Wujun Prefecture. Additionally, it is surrounded on three sides by a moat, and there's a trench dug in front of the city gates—if filled with fire oil, it would surely intimidate the enemy.
