When constructing the Fenglei Fort Defense Line, the placement of cannons and catapults was considered, which led to a design unlike any other wall.
First of all, the wall was unusually wide, more than twenty meters at the top.
Secondly, there were many small firing holes inside the wall, just big enough for one cannon to retract and elevate.
Moreover, once on top of the wall, it would be discovered that there was another tier, on which both the cannons and catapults were positioned.
In other words, even after Zhi Li's forces stormed the wall, they still couldn't halt the firing of the cannons and catapults. They had to eliminate the outermost layer of Rock Thieves Corps first before they could charge onto the artillery platforms of the second layer.
But defeating the Rock Thieves Corps...
At Tianlang Pass, the two thousand-strong Rock Thieves Corps directly repelled an enemy force nearly three times their size!