The famous swordsmith Gan Jiang was summoned to the palace of the King of Chu, for--so it was said--the king's concubine had given birth to a lump of black iron. The king decided to have this extraordinary treasure made into a sword.
鑄劍名工幹將被楚王召見進宮，據說王妃生下一塊純青透明的鐵，大王知道是異寶，便決計用來造一把劍。