The Second Outer City.
Inside a small factory building.
The people inside were engaged in a heated discussion.
"If we want to efficiently and quickly construct the Third Outer City, considering we have so much steel equipment now, I still think the idea I just proposed is more suitable." He Bing said passionately to the few people in front of him.
Zhou Ran started speaking, "According to what you said, if we make the gate with a 6-meter passage, double doors on both sides, reinforced with thick steel plates on the outside, I-beam framed gate, and cast lattice gate on the inside, this idea indeed could work. But the steel framework is easy to corrode."
Li Hang nodded and said, "Yes, after the acid rain, this steel framework, although it looks solid, feels less reliable than concrete and filling the middle with rammed earth is more secure."
