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You should know that excellent quality metal ingots are currently worth a 1 to 200 exchange rate with ordinary metal ingots, and there are certainly many people willing to make the exchange.
There's no way around it, to upgrade the Lord's Mansion, high-quality resources are key.
"I'll just modify the furnace myself, etch some Demonic Runes on it, and expend a bit of territory energy to improve the smelting quality."
For Xiao Yurou, as a Mechanic, she was capable of reverse-engineering mechanical blueprints. Once she had thoroughly researched them, she could enhance and modify them based on the original design.
"Tsk, Xiao Yurou is impressive. I'll pack up all the ore and send it your way, and wait to be fed by you."
Xiao Yurou indeed was his lucky star, and Lord Zi felt extremely gratified about the original abduction.