While the battle here was in full swing, Shan Yue's five-person team with the mortars had already quietly hidden in Jiang Huai's nest. A large portion of the people were taken away by Jiang Huai. They wanted to swallow Cang Xin in one go, so there naturally wouldn't be too many people left in the army to guard it.
And it was precisely because of this that Shan Yue arranged for Chang Ling to divert their attention while she infiltrated the camp.
Under the weak light, seven black shadows quickly flashed past the wall. They were so fast that if one did not stare carefully, they would not be discovered at all.
The seven of them lay dormant in the corner and watched as the patrols passed wave after wave. In a short while, they figured out the interval between shifts. After learning this information, it was easier to carry out the next operation.