Zhao Song furrowed his brows slightly, "Your grandfather's sword has been with him for many years, it's an ancient sword with a sturdy blade, how could it have a nick?"
Zhao Hanzhang replied, "We encountered a group of Xiongnu soldiers, and the knives they used were extremely good, not inferior to our Central Plains weapons. I wonder where they got their high-quality iron ore."
Zhao Song thought for a moment and said, "Bingzhou has many iron mines. Previously, Liu Yuan occupied the Bingzhou area. If the difference in weaponry is due to the quality of the iron ore, it must be from Bingzhou."
Zhao Hanzhang was pensive. The steel-making process requires higher purity iron ore. Mr. Ji bought two pieces from the iron shop in the county town for Fu Tinghan to practice, but they found the quality of the iron ore very poor, making steel was exhausting, and the refining rate was very low.
