3. Evaporation: The solution is heated and evaporated, causing the salt to precipitate out of the solution, resulting in pure sodium chloride crystals.

However, during the filtration process, other chemical substances need to be added to react and separate impurities from the solution, which Liu Wei is unable to do.

However, after repeating this process many times, a fairly pure crystal was obtained.

Seeing the snow-white salt in the pot, the people's eyes lit up.

They usually use coarse salt; when cooking, they simply take out a piece of salt, roll it around in the pot, and that's it.

When have I ever seen such fine salt?

"Every household that participates in the salt-making process today will be rewarded with one jin (500 grams)," Liu Wei announced generously with a wave of his hand.

It should be noted that at that time, the price of salt in the Eastern Han Dynasty was 1200 coins per shi (120 jin), which is about 10 coins per jin.

However, this is the price of coarse salt.

Based on the current ratio of refined salt extraction, 50,000 jin will yield 5,000 jin, a ratio of 1:1.

So a pound of snow salt would cost at least 100 coins, and that's just the cost of materials.

Now that the prince is so wealthy, he's giving each family a pound of salt, and it's this snow-white salt at that.

Coarse salt contains many impurities and tastes bitter.

But this salt in front of me is the real deal!

Immediately, the people knelt down, tears streaming down their faces, and shouted, "Long live the Prince!"

"I will set up a workshop here, and you will help me refine snow salt."

Liu Wei shouted, "At that time, you won't need to farm anymore; you'll just receive wages..."

Liu Wei painted a splendid picture for the people of Wuyuan City's fiefdom.

Now, he owns a coal mine, a blacksmith shop, a carpentry shop, and this snow salt processing workshop in the fertile land, and the people's livelihood and economy are beginning to take shape.

"Your Highness, where does this salt mine come from?"

Beside him, Zhang Liao, who had been urgently summoned from the Shuofang County Prefectural Governor's Office, asked curiously.

"Wen Yuan, this is the reason I summoned you!"

"The spearmen are almost done with their training, it's time to take them out for a spin!"

Zhang Liao was taken aback.

Are you suggesting we send his troops to mine salt?