C1040 Straw Paper.

"What? Reinforced concrete?" Eleanor was stunned. "Isn't this a bit too funny? Reinforced concrete was invented in the nineteenth century. How could there be reinforced concrete in the thousands of years ago? Did he just transmigrate? "

Mike, who was behind them, had an awkward expression on his face. He knew about this news. When the huge rock formation of reinforced concrete was exposed