Zhu Jingshu’s face returned to a faint smile as she said, "Forging the Tiefutu requires black iron. I’ve checked the black iron mines in Dajin, and there are very few of them in total. Over the past decade, the black iron produced by Dajin could at most forge twenty thousand sets of black iron armor. By my estimation, the Prince of Funan has at most twenty thousand Tiefutu, perhaps even fewer. Am I right to guess so?"
Yun Que frowned.
The Yongping Princess before him was far too scheming; she had even investigated how many black iron mines Dajin possessed, and from that, deduced the exact number of Tiefutu.
Chapter 231