On the cart lay an iron tube over a meter long, reminding Li Banfeng of the childhood game of pretending a handcart was a tank.
"Can this thing open the boundary line?"
The Old Man replied, "The data you brought back mentioned that. Those from the Outside Provinces call this thing the Magnetic Quake Cannon. Whether it works or not, I'm not sure, but you can give it a try."
This thing really is called a cannon.
Beside the cannon barrel, there are many wires and switches, as well as numerous dials and knobs. Li Banfeng scratched his head and said, "How do you use this thing?"
Portable Residence said, "See the battery below? First, fully charge it."
...
"Where to get electricity?" Da Boyins was in a dilemma. He had found craftsmen to make the equipment according to Xiao Zhenggong's requirements and completed the assembly of the Magnetic Quake Cannon in Greenwater City.
