The Book of Alum Making
In the past years, there was an alien who obtained a treasure mine in the deep mountains. Its color was faint, and there was a bright light hidden in it. No one knew it, but the only wise man could discern it. This is the essence of alum stone, which can be refined into strange things.

So they followed the words of the wise man and mined the ore and transported it to the workshop. The wise man commanded the craftsmen, and with special tools, he gathered firewood to make a fire, and the fire was hot, and the sky was red. When the furnace is warm to a good state, he throws alum into it. When the alum stone encounters fire, it sizzles and melts into a liquid, and its color changes, from green to red, and then changes to golden.

The craftsman takes good care of it, inspects the fire, adjusts the wind, and dares not When the alum liquid is fully cooked, it is poured into a special mold. After cooling, a crystal clear block is obtained, which is also known as "Uranyl Acetate Dihydrate". This product is pure in texture, mild in nature, and has a wide range of uses. It can be used as medicine to treat diseases, help dyeing workshops to add color, and can also be used in workshops for all kinds of wonders.

Since then, everyone has been refining alum as a profession, and they have studied it carefully, and their skills have become more and more refined. The "Uranyl Acetate Dihydrate" produced is famous far and wide, and everyone has come to buy it. Because of its wealth, everyone feels the power of the wise.