Xie Ling pointed at her forehead and said, "Stop joking. Where is the task assigned to you?"

Gao Wanhua stood up straight in an instant, "I've been ready for a long time!"

She took out a blueprint from her bosom, opened it and placed it in front of Xie Ling proudly.

There are easy-to-understand simple drawings on the drawing. There is not a single word on it, but you can tell what it means at a glance.

The task that Xie Ling gave to Gao Wanhua was to ask her to draw the new method of salt making using simple drawings so that the salt workers could understand it at a glance.

The traditional salt-making process includes the steps of absorbing tides, making brine, crystallization and salt mining.

Tidal drainage is the process of driving seawater with high salt content into the repaired salt fields.

Making brine means letting seawater evaporate through the sun. When it reaches a certain concentration, the brine is transferred to a crystallization pool for further evaporation. The raw salt will slowly settle at the bottom of the pool, forming crystals. When it reaches a certain level, it can be collected.

Making salt in this way is not only slow, but it is also difficult to control the concentration of brine and often fails.

If the concentration is not controlled well, half a month's work will be wasted.

The concentration of brine can only be determined by a master chef.

But people make mistakes and horses stumble, and even a master craftsman cannot succeed every time.

Xie Ling's new method uses stepped salt pools, with a drop in the middle of each pool, which are dug lower one by one.

On the first day, seawater entered the highest brine platform.

The next day, put seawater into the second brine table, and then fill the high brine table with seawater.

On the third day, put the seawater from the two-halogen platform into the three-halogen platform, and the seawater from the high-halogen platform into the two-halogen platform, and fill the high-halogen platform with seawater again...

Similarly, using sunlight to evaporate water can increase brine concentration and reduce labor costs.

As for measuring brine, lotus seeds are used.

This was told to Xie Ling by a salt worker when she was playing at the beach at the end of her life.

She lived by the sea for a while and made her own salt using this method.

The brine is divided into 100%, and 100% is saturated.

Take two lotus seeds, one is 50% and the other is 100%.

If the lotus seeds rise in the brine, it means they are 20% to 30% marinated. If they float on the surface of the brine, it means they are 50% marinated.

When 100% lotus seeds float obliquely in the brine, they are 70% to 80% marinated. When they float flat on the surface of the brine, they are 100% marinated.

Only when the brine reaches 100% can it saturate and crystallize into salt.

This method is very precise and there will be no mistakes.

Xie Ling read it once and said, "Go over there and show it to the workers and teach them how to understand it."

Gao Wanhua took the drawings and even before she taught them, the salt workers understood what they meant just by looking at the drawings.

After all, I work in this field, so I have to be more sensitive.

That day, the salt workers began to dig the pond according to the drawings.

Xie Ling had already brought the lotus seeds and handed them to a veteran craftsman who usually measured the concentration of brine, and he carefully explained some details that are easy to overlook.

The old master listened very carefully and seemed to understand, so Xie Ling felt relieved.

This method can greatly increase the salt production. Now we just have to wait for the salt to be ready.

Xie Ling named the salt field on the Feng family's side Xinan Salt Field.

It is under the care of Fengjian Qingli and Wu Zhengqing, and the same rules apply: one day off every three days, rice is provided every day, and salt is made using the new method.

The salt workers worked very hard for rice and rest.

Xie Ling calculated that if the two salt fields were put into operation, the monthly output should be around 150 dan, while the original total was less than 80 dan per month.

No, it's too little.

At most in half a year, Lin Qianzhong and Caiyi would bring a caravan here. She had to give them enough salt so that their trip would not be in vain and it would also help her create a market for her future products.

The reason why these two salt fields produce little salt is that there are too few salt workers and the site is too small.

At the nearby Changshou military settlement, the salt field can produce a minimum of 800 shi of salt per month, and this is a conservative estimate.

There were many prisoners and salt workers in Changshou Military Station, and the area was wide and flat, making salt production very convenient.

Xie Ling was itching to try it.

The salt field of Changshoujuntun originally had a share in Sinan County, but the old fox Wang Shouyi was reluctant to give it up and monopolized it for so many years.

Xie Ling wrote the four characters "Chang Shou Juntun" on the paper and drew a big red circle around it.

————

Autumn is approaching. Although the daytime is still hot, the nights are getting colder and colder. The coldness penetrates into the bone marrow. The coldness of Lingnan winter has begun to show, revealing its sharp fangs to outsiders.

Pei started to change autumn clothes for Rujie, Gu Wei and Yunchuan.

Song was also busy making thick winter clothes and shoes for her family. She didn't know at the moment that Xie Ling had brought her a big business.

It was the same for other families. The women made winter clothes, while the men went up the mountain to collect firewood or bought cheap charcoal and stored it.

In the Gu Mansion, the lush osmanthus trees outside the windows of each courtyard and room began to form buds. Clusters of small golden flowers gathered together, surrounded by emerald green leaves, and a slight sweet osmanthus scent was already wafting out.

The entire mansion is immersed in the fragrance of osmanthus. One can already imagine the rich aroma of autumn rising to the sky and the whole courtyard covered with golden armor.

Xie Ling sat at the desk, with cold wind blowing in from the window. She was immersed in her work and didn't think about anything else. Her fair wrists exposed by her wide sleeves were covered with goose bumps.

It was not until a thin blanket fell on her that Xie Ling came back to her senses and looked at the person who came. "You're back?"

Gu Wei nodded, stretched out his bony hand, and touched the tip of Xie Ling's nose. "Why is it so cold? Wear more clothes, and don't sit by the window all the time next time."

As he spoke, he walked forward and closed the window, letting in the sweet scent of osmanthus flowers.

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