She had checked some data, and mercury was extremely rare and valuable in this era, while aluminum, though also not abundant, was more plentiful and cheaper.
A few days ago, when Big Brother Luo was leaving, she mentioned to him the business of making mirrors, so that no one would suspect it was related to her.
Indeed, no one suspected a thing, as Apricot Forest Hall was widespread throughout the land, and it was very normal for Young Master Luo to know of this matter.
The truth was clear as day to Long Xuanmo, but he didn't expose it in public, just looked at his Ah Jiu with eyes full of pride and tenderness.
