So Faon started the next round of mineral exploration in Champasak, and the location was still selected in Champasak, in their opinion, the safety of experts from other countries is the most important, anyway, the copper mine has been discovered, isn't it? To ensure the safety of experts before exploring the minerals, Champasak is undoubtedly one of the safest places now, after all, there are more than 100,000 troops stationed here, and it is also very close to Cham, and it does not take a few days to return to Champa.

On February 27, the 24th year, the river network of Heishui has spread throughout the northeast of Heishui, and the river of the river eventually flows into the main stream of the Mekong River, and finally flows into Cam Ranh Bay, which is the repair of the northern river, in order to facilitate the faster drainage of the Mekong River during the flood season, so everyone began to repair two outlets, one is from the west to the sea into Jinoujiao, and the other is from the south to the sea into Jinoujiao, Cai Fengjie also intends to temporarily stop, and in recent times, it has hurt the money and the people, although everyone is very satisfied, and expressed their willingness to continue to work, Cai Fengjie still temporarily stopped the construction of the river, at least until the local financial income improved.

So the people of Heishui began to move one after another, before they were forced to live on the edge of the river, now the entire north and east have been successfully connected to water, there is not so much restriction on their residence, they all rushed to choose fertile land, and then the whole family moved over, the development of Heishui is finally on the regular, the people of Heishui are mainly to grow food, followed by the cultivation of spices. In addition to these two, the company also experimented with a new crop, sugar cane, in Blackwater. Sugarcane is also a very important cash crop, as it produces sugar, an important condiment, and the remaining residues can be used to produce paper. Maybe after the establishment of the Ming Dynasty, such sugar is nothing, and now when it is so chaotic, how can anyone be busy producing sugar, everyone is fleeing the war everywhere, and it is good to survive.

Therefore, sugar, like salt, as a scarce commodity, is very high in the Central Plains now, and now it is in very little supply. Not to mention anything else, if salt falls from the original gold to the price of cabbage, and people can afford it, are people still unwilling to improve their lives and eat some salt and sugar?

Although people's lives have been improved, there are still many diseases prevalent among people, such as the big neck disease that is prevalent in northern Zhanbei, it is said that many people have this disease, and there is no way to solve it by looking for famous doctors everywhere, the government sees that there are too many people who are sick, and they dare not take it lightly, so they reported this matter to the central government, and they have also heard about this matter.

Good fellow, big neck disease, how can this disease be prevalent. After investigation, Haiphong, Lang Son and other coastal cities have fewer incidences, and officials don't know what's going on.

In order to prevent big neck disease, most of the edible salt was added to iodine, that is, iodized salt, but now chemistry has not started at all, and it is not easy to synthesize potassium iodate, but as we all know, kelp is rich in iodine, which has an excellent effect on the treatment of goiter, so it is personally published in local governments and newspapers, kelp can treat big neck disease, and then the following is the popular science about kelp.

Of course, in order to prevent someone from maliciously raising the price of kelp, the trade of kelp is currently fully responsible for the government, and the local governments buy kelp and then sell it to the people. Needless to say, people with big neck disease are also afraid of being contaminated with this disease, so they also start eating kelp.

Seeing this, he published an article in the newspaper: Eating too much kelp is also easy to get sick, so the original kelp wind was slowly calmed down.

The rest of the kelp is pulled closer to the nearby factory in the salt factory at the request of Pengqiao, the workers dry all the kelp, and finally grind all the kelp into powder, these kelp will be mixed into salt according to the proportion, since I can't synthesize potassium iodide, then I will replace it with other ingredients, and finally have a certain effect, right?

Soon iodized salt began to be produced, people soon found that all the salt on the market was replaced with iodized salt, and then an article released by Pengqiao, the benefits of iodized salt, people have expressed their understanding after understanding, iodized salt was limited to domestic sales at the beginning, and then the accumulation of a certain amount of time, and eventually it also flowed into the international market, businessmen around the country think that since it is salt, white and clean is the best, and now these salts are stuffed with other things, businessmen naturally dare not continue to buy, So the iodized salt was cold in the international market, and the merchants of Cham hated it, and sold it to you at a low price, so don't blame us.

So the merchants who went abroad to do business met a person with a big neck disease and sold salt to him, and then it was really good, causing a sensation among the people in various places, and people rushed to go to Cham or asked someone to go to Cham to find and buy a panacea, and now Cham is full of foreigners everywhere, and Cham has earned a lot of toll tax through this. Officials were happy to sell it to them, but now the salt works have begun to produce light salt for export, and the salt used for export is now either circulating in the Natuna trade node or in the hands of various merchants.

So these people were reluctant to rush thousands of miles to the Natuna trade node, they rushed to buy iodized salt at a higher price, and the merchants of other countries were very confused at first, these people were afraid that they would not be invited by the Cham people, and all came to buy salt. Later, when they met someone they knew to buy salt, and learned that it could prevent and cure neck disease, the whole market boiled. In just half a day, all the iodized salt was purchased, and the merchants did not hesitate to pay double or even triple the price to get the iodized salt.

As for those who didn't grab it, how arrogant they were at the beginning, and how much they regret it now, so the sales of iodized salt have been opened, and the price has almost tripled.