Most people are familiar with alchemy.
The fundamental content of alchemy is the search for a method to transform lead into gold, a pursuit that has captivated countless individuals since ancient times, both in the East and the West.
Why were people back then eager to turn lead into gold?
The reason is simple: lead is cheap, gold is expensive, and in many aspects, lead and gold have similar properties, with the only significant difference being their color—lead is bluish-gray, while gold is yellow.
Someone must have thought, if there's a way to add the attribute of "yellow color" to lead, wouldn't it become gold and thus bring wealth and prosperity?
So, how to add "yellow color"?
The color of brass is somewhat similar, try adding some copper.
The color of sulfur is also close, try soaking it in sulfuric water.
There are also other methods...
In this way, countless people have tirelessly sought this knowledge, studying for hundreds or even thousands of years without success.
