The two lingered for a month, and during the honeymoon, Gongsun Kang taught Zhen Jiang to make soap.

Marrying a daughter-in-law is not for the sake of viewing, but for the best use. Gongsun Kang told his daughter-in-law how to make soap, and asked Zhen Jiang to establish the Xinghua Chamber of Commerce and preside over sales.

Quicklime can be obtained by burning mountain stones, and slaked lime can be obtained when it encounters water. Hydrated lime is alkaline and slightly soluble in water. Animal fat, such as lard, mixed with lye, high temperature treatment, multi-layer filtration, mud leakage adsorption and then filtration. It's soap. Condense into chunks and cut into neat cubes. to use.

In this era, there are already people selling alkali. If it is produced in small batches, it can be directly bought with alkali and cooked with pork fat. Then pour in the highly alcoholic catalyze. The soap liquid floats on the top layer of the large iron pot. Remove the upper layer of liquid and condense it to form a lump.

After making the soap, there are still some cloudy soap and alkaline waste liquid left in the pot. Glycerol can be extracted from this. It is the main raw material for the manufacture of nitroglycerin in explosives. Nitroglycerin is too dangerous, and Gongsun Kang does not have the right people to make it.

He just had people build a large pond out of stones and asked for the waste liquid to be discharged into the pond each time. Gongsun Kang is making raw material reserves, hoping to use these raw materials in the development of nitroglycerin in the future.

You can also sprinkle wildflower petals to get soaps with different scents; Loading condensation with different molds can get square, round, and even bunny shapes, kittens, puppy shapes, etc.

The scope of operation in this is very large, and it all depends on Zhen Jiang to preside over it.

Gongsun Kang is also to observe whether Zhen Jiang will pass on the method of production back to the Zhen family, and the way to make money is very good. If Zhen Jiang can't help but pass it back to the Zhen family, then she is not a smart person, and she also puts the interests of the Zhen family above Gongsun Kang, then the future queen candidate, Zhen Jiang, will be out.

For the sake of insurance, Gongsun Kang still solemnly explained: "This year and next year, there will be millions of displaced people in Liaodong, and the grain of millions of displaced people will be on these soaps." So beloved wife must keep it secret, at least we need to monopolize it for two years. ”

Zhen Jiang's eyes flowed, and his love was lingering. "Don't worry, I understand what my husband means, I won't tell the Zhen family the secret recipe. My husband doesn't need to tell me the secret recipe at all, I can make it in a workshop at home, and I can set up a chamber of commerce to sell it. ”

Gongsun Kang secretly gave her a thumbs up. smiled generously and said: "You and I are one husband and wife, what can I keep secret from you." ”

Then talk to Zhen Jiang about sales techniques, Zhen Jiang is an expert in this regard. But Gongsun Kang came from later generations and naturally had a wide range of knowledge.

Sales are knowledgeable, Gongsun Kang put forward a few small suggestions:

1. It is given free to officials, noble ladies, and large businessmen. Rely on word-of-mouth to spread and advertise.

2. It is a new product launch conference. Every time a different scented soap is introduced, a new product launch can be held. On-site experience, on-site purchase.

3. It is a promotion, buy ten get one free.

4. Collect advance payment and auction the exclusive agency right in each region. There is a three-year term for the agency, and there is also a minimum sales restriction.

As for the national uniform price, it will not be considered for now. Let's get a handful of it in the aristocracy first.

The sales methods of later generations of merchants are also commonplace for ordinary people. At this time, even Zhen Jiang, who was born in a wealthy merchant family, admired it.

After arranging Zhen Jiang's work, Gongsun Kang began to arrange the exploration and mining of mineral deposits.

The strategy for the development of mineral deposits is multi-pronged:

1. It is under the city wall on the side of the entrance of each county, put a row of wooden shelves, put all kinds of ores as they are, and there is a special person to explain. Heavy money to buy the origin of mineral deposits.

2. It is to organize professional mining personnel and gold captains to form a prospecting team. occupation to find mineral deposits.

3. It is to strengthen the mining volume of existing known mineral deposits.

The miners came from three kinds of people: troublemakers among the outcasts, alien slaves, and captives of the Yellow Turbans. Let's go to cut down trees, build houses, and mine. Starve for three days. In the future, only 1/2 of the normal man's food will be given every day, and he will work honestly and seriously, and then resume normal food. Those who do not work hard are whipped. Those who refuse to change their ways, kill.

The Hu people don't know how to farm, so let's catch them all and open mines. Gongsun Kang felt that the problem of the miners was not a problem at all.

Lelang County, near Pyongyang. There are a lot of mineral deposits that can be exploited. I won't leave it to Jin San Fatty. In fact, we can only dig some open-pit deposits. Deposits buried hundreds of meters deep in the ground cannot be excavated under any circumstances with the current state of technology.

Iron ore and copper ore are more urgent. Iron ore can be used to craft weapons and armor, and copper ore can be used to mint money. Iron ore and copper ore are widely distributed in the three counties of Liaodong, especially there are many small iron mines in Lelang County. So the first thing the captives were forced to mine was the iron ore that has now been proven.

Lelang County has a large amount of coal resources. Fushun is located in Xuanfu County, Fushun has the only shale oil production plant in China in later generations, which can produce thermal oil.

Coal is mined first, and then the coal is used to heat and purify the ore. It is also necessary to invent fire oil and explosives first, and use them to dig rocks.