C418 Simple Construction Materials

Steel?

How expensive was that thing!

You want to use it on buildings?

That was simply a fantasy!

Now, even if they wanted to use a set of metal utensils, it would be extremely difficult.

Not to mention using steel to build a house.

Everyone looked at Xiao Yun with a strange expression.

Xiao Yun curled his lips and muttered, "Don't be ignorant."

He took a deep breath and said