According to Yang Ling's request, Cao Cao had already ordered his soldiers to set up a cauldron in the backyard of the General's Mansion.

In addition, there are charcoal, gauze and other items on the table next to it.

Yang Ling put the black-brown lumps prepared in advance on the table.

This is the brine salt he asked people to find, that is, the poisonous salt in the mouths of Cao Cao and Cao Ang.

Although there is no technology in the brine, it is all ruthless.

With the current level of medical care, once you take too much, you can only wait for death.

"Big brother, what are you doing, sir?"

Cao Qing asked with some curiosity.

"Teacher, this is refining table salt."

Cao Ang said and explained to his sister.

"Really?"

Cao Qing listened, her beautiful eyes were full of surprise.

Although she comes from a noble background, she also knows the importance of table salt!

If Yang Ling can really turn poisonous salt into table salt, it will definitely be able to cause a sensation in the imperial court!

Cao Ang just wanted to say something, but Cao Cao in front glared at the brother and sister,

"Silence!"

Cao Qing stuck out her tongue and hurriedly closed her mouth obediently.

Cao Cao and the others all held their breath and stared at Yang Ling tightly.

I saw Yang Ling walk to the desk, pick up the tools on the table, and grind the large pieces of brine salt.

When it was powdered, he put it in a wooden basin with clean water.

Then Yang Ling picked up the gauze and thought about the water in the wooden basin.

After this operation, the water that dissolved the brine salt was much clearer than just now.

But that's not enough.

Yang Ling took a bag made of gauze again, put the charcoal powder prepared in advance into it, and thought twice!

After this time, there are no impurities in the water in the basin.

So Yang Ling poured all the water into the cauldron supported next to him, and ordered the soldiers to start boiling water.

After a while, the salt water in the pot was bubbling up.

If you keep burning like this, you will get salt when the water dries.

However, although the quality of these salts far exceeds those produced anywhere in the world, due to the impurities contained in them, they will taste a little bitter, which is not what Yang Ling wants.

Watch me take a spoonful of Sanhua light...... Oh no, a spoonful of bean juice!

Yang Ling scooped up a scoop of bean juice and poured it into the pot.

Soon there was dross floating on the surface.

After Yang Ling scooped it out with a scoop, he added bean juice to it again.

This is repeated three or four times, and no more foam is produced.

Yang Ling also dropped the scoop and patiently began to wait for the water to dry!

After a while, the water in the pot is completely boiled.

Cao Cao and the others, who had long been impatient, hurriedly stepped forward and took a look.

It didn't matter what they looked at, they were all stunned.

I saw that the inside of the pot was full of white powder.

Yang Ling collected them, grinded them once, put them in a bowl, and handed them to Cao Cao.

"Please taste it!"

Cao Cao carefully picked up the spoon and scooped up a large spoonful of salt and sent it to his mouth.

Although he was swept away with beautiful legs, he couldn't help but show a shocked expression!

The salty taste is pure, it is the taste of table salt, and it can be tasted without any impurities!

"Oh my God, sir...... You've actually refined usable table salt from poisoned salt......"

Rao is Cao Cao is accustomed to strong winds and waves, but at this moment, he is so excited that he stammers when he speaks.

Cao Ang and Cao Qing on the side also couldn't wait to come forward to taste, but they were also stunned.

If it weren't for what they saw and tasted with their own eyes, they wouldn't have been able to believe that those poisonous salts would turn into table salt after Yang Ling's miraculous operation!

Compared with the salt circulating in the world, the taste refined by Yang Ling is pure, and the whole body is white, like fine sand and snow particles, which can be called the best!

If it can be promoted, it can definitely replace the salt produced in Qingzhou.

In this way, there is still no need to worry about the shortage of finances and the inability to expand the army?

"Sir has really helped me a lot!"

Cao Cao held Yang Ling's hand, his eyes were extremely hot!

He was just married to a daughter, so Yang Ling provided such a rare and peerless salt making method.

How many more ......

Thinking like this, he looked at Cao Jie, Cao Hua, and Cao Xian on the side.

Fortunately, several girls were surprised by the salt refined by Yang Ling, and they didn't notice their father's "loving" gaze.

At this time, Cao Ang seemed to suddenly remember something, his face was solemn, and he said to Cao Cao,

"Father, you can't tell outsiders this method......

Cao Cao's face changed, and only then did he react to keep it secret.

If Yang Ling's salt-making method spread, not only would their interests be damaged, but also other princes would benefit.

Thinking of this, Cao Cao shouted at Dian Wei,

"When the wait is over, all the soldiers present will be controlled, and no contact with outsiders will be allowed, understand?"

"The last general understands!"

Dian Wei arched his hand.

Don't look at these soldiers are Cao Cao's personal guards, there is no need to doubt their loyalty.

But Cao Cao was a suspicious person, and the salt-making method was invaluable.

If someone really can't resist the temptation, it's trouble!

Even if you don't kill them, when you go back and set up the salt pond, you have to let them be in charge of guarding the town, and you can't leave at will.

Cao Cao thought so, straightened his face, and said to Cao Qing and the girls,

"This matter is very important, if you dare to tell others at will, don't blame the father for not remembering the love of father and daughter!"

Seeing that their father was so serious, the girls hurriedly nodded.

Cao Qing can rarely see her father lose his temper like this!

It seems that his future husband is really a dragon and phoenix among people!

Cao Qing looked at Yang Ling's gaze, full of admiration, and said with a smile,

"This thing is so white, why don't you name it Snowflake Salt?"

"The name given by the young lady is simple and easy to remember, and it is very appropriate, so I think it is okay below."

Yang Ling said with a smile.

Hearing this, Cao Qing's heart suddenly felt happy.

After some deliberation, they decided to divide the table salt into two types.

One is salt with a bitter taste that is not added to soybean juice, which is cheap and mainly aimed at the poor.

The other is snowflake salt, which is more expensive and is mainly sold to dignitaries and wealthy people.

After Yang Ling wrote down the salt-making method, Cao Cao was like a treasure and put it in his arms.

But just happy for a moment, Cao Cao was worried again,

"Sir, although the salt making method is precious, it can make a steady stream of money in the future."

"But at present, the imperial court's finances are tight, and it can't allocate money to start this business."

"Do you have a way?"

Yang Ling thought about it again, and then said with a smile,

"There is a way for subordinates."

Cao Cao's eyes lit up,

"Sir, come quickly."

"The lord can issue treasury bonds."

"National debt?"

Hearing this new term, Cao Cao and Cao Ang looked confused.

"Yes, as the name suggests, it is the debt of the state."

Yang Ling explained,

"It is to raise funds from the people in the name of the imperial court, promising to pay them interest and repay the principal when due."

"In this way, the problem that plagued the lord can be solved!"