The Sweeper and Shang went towards the first barrier.
The Sweeper took out a complex medal that looked a bit like the Barrier Disruptors Shang had used before but far better and more advanced.
She put the medal on the barrier and spoke several complex chants.
After a couple of seconds, a hole appeared in the barrier.
And then, she retrieved the advanced Barrier Disruptor.
Yet, the hole stayed open!
This surprised Shang quite a bit.
Usually, Barrier Disruptors had to stay on the barrier because they were responsible for diverting the flow of Mana. By taking them away, the Mana would flow in the way it was supposed to again, closing the hole.
If one wanted to create a permanent hole in the barrier, one would need to completely reprogram the Magic Circle running the barrier, and there were innumerable safeguards against that.