Inside the shelter.
Lin Yi begins reinforcing the steel walls.
These walls are designed to be 10 meters high, making them difficult to climb. They are sturdier than the previous versions.
Each side of the shelter spans six thousand meters, with the total defensible area amounting to nearly 6000 acres.
He used up 7800 tons of steel, which is a massive consumption of the precious steel reserves.
Each meter length of the wall also costs 15 coins, totaling 975,000 coins.
Next comes the concrete wall, the main defense facility of the shelter.
Its height remains the same as before, 20 meters, but its width has increased to 5 meters, with four layers built inside for accommodating personnel and various equipment.
Shooting holes have been opened on the walls, allowing soldiers to fire at the enemies while under cover.
Inside the wall, he installed platforms for mortars and cannons. The shelter currently doesn't have actual cannons, but Lin Yi believes they will eventually have them.
