Putting down the teacup, Zhao Guo'an explained, "According to ancient records, Ujin wood is a type of wood unique to Japan. This wood is very special—it's fireproof and not as hard as other woods, so it can't be used for burning or as building material.
Later, someone discovered that by extracting the golden substance from Ujin wood and adding it during weapon forging, ordinary iron could be transformed into a divine weapon, slicing through iron like mud, and taking an enemy's head would be like retrieving an item from a bag.
It's said that Liu Xiu, Emperor Guangwu of Han, had a sword that incorporated Ujin wood. However, this claim lacks basis, but there's no doubt that Ujin wood can enhance the sharpness and strength of cold weapons."
After listening, Xiao Feng pondered and said, "So, according to you, Ujin wood should be something blacksmiths should study, right? How do you know all this so well?"