On the way back, the wheels rolled over the bluestone slabs, making a rhythmic light sound. Gu Fang was silent for a moment before finally speaking: "If we are to build city walls with a steel skeleton like this, the amount of iron required... would it be extremely large?"
Lin Yi thought carefully before answering: "Actually, concrete structures do require a lot of steel rebar; otherwise, they can't withstand the pouring of concrete. But the rebar is very thin, and we're only using it for the city walls, so it should be manageable. Is the Great Qian's iron ore insufficient?"
Gu Fang shook his head: "Great Qian has abundant iron ore reserves. If mined properly, quantity is not an issue."
Lin Yi was about to ask if there were any technical difficulties when she heard Gu Fang say hesitantly: "It's... the forests."
"Forests?" Lin Yi didn't immediately see the connection.
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