Back in Liaodong, Gongsun Kang had a feeling of idleness.

Zhen Jiang and Cai Wenji are five months pregnant and are expected to give birth next year. Now that he has shown his feelings, he doesn't dare to walk fast, but he has to move slowly.

Zhen Jiang's Xinghua Chamber of Commerce has been handed over to her sister Zhen Dao to manage. She doesn't feel at ease with others, she only trusts the Zhen family.

With the development of the Gongsun family in Liaodong, the Zhen family is already considering whether to move to Liaodong. Although it has not been implemented at present, Zhen Jiang's elder brother Zhen Yan has already served as a county magistrate in a county under Liaodong County.

Externally, the Liaodong military has always implemented the principle of plundering and training troops. They take turns going out to Samhan and Goguryeo to rob every month. If they gather a large army to attack. The Liaodong Army relied on the city wall to fight defensive battles and never suffered losses.

Samhan and Goguryeo Yueyue lost blood, and if this continues, it is estimated that the country will collapse and collapse within 10 years.

Buyeo has an in-law relationship with the Gongsun family, and the Buyeo people are also very honest and never come to Liaodong to plunder, so Liaodong is also friendly with them. At present, Liaodong is still a vast and sparsely populated situation, and there is no shortage of land at all. Therefore, Gongsun Kang has no idea of fighting Fuyu for the time being.

The Wuheng people in eastern and western Liaodong have been cleaned up; The Wuheng people in Youbeiping are the meat in Gongsun Zhan's bowl, and Gongsun Kang is not too embarrassed to grab it.

The Xianbei people, the Huns and Liaodong are still separated by Gongsun Zhan, and they will not need Gongsun Kang to teach a lesson for a while.

Therefore, Gongsun Kang suddenly had a feeling of having nothing to do.

Let's find something to do in general. Gongsun Kang found two things.

One is to have a dog. In later generations, the picture of the Japanese people leading the big wolf dog to search the Eighth Route Army was performed every day. So dogs are still useful.

Gongsun Kang found some shepherds with shepherd dogs and set up a military dog farm. They are required to train military dog breeds. In the future, it is planned that the task of guarding the camp to prevent stealing the camp and guarding against enemy surprise attacks falls on the military dogs.

You can also keep dogs as scouts, and use their keen sense of smell to spot the enemy's ambush circle in advance.

In this regard, Gongsun Kang is only responsible for making requests and paying money. The rest is for the herders to do it. This military dog farm was also assigned to Li Shanchang, and those who can work harder, let Li Shanchang send someone to manage it.

The second is to make matches. There are phosphate rocks in Liaodong, which are still very rich. The last time he saw the fire-breathing liars, Gongsun Kang thought of developing phosphate mines. Phosphorus is not only used to make matches, but also to make phosphate fertilizer, and there are many other uses.

In this era, there are already fire folds. It is made of flammable substances such as cotton, reed tassels, nitrate, sulfur, rosin, camphor and a variety of spices.

The principle of fire fold is called "re-ignition" in physics, which refers to the phenomenon that things that are already burning are in a state of half-burning and half-extinguishing due to lack of oxygen, and when oxygen is regained, it immediately begins to burn. The fire fold is to artificially add an outer cylinder with flammable straw paper to create an oxygen-deficient environment and turn the open flame into a spark. Then the lid is opened, and Mars gets enough oxygen from the new to start burning from the new.

The method of making matches is: on the one hand, use flammable wood to make small sticks (called match stems), and dip wax oil and ******-containing herbs (called match heads) at one end to make matches; On the other hand, the packaging box is coated with a phosphorus surface containing red phosphorus. When using, the match can be ignited by rubbing it on the phosphorus surface, which is extremely convenient.

So what is ******? It's salt! To be exact, salt contains a small amount of ****** in between. The brine after the extraction of coarse salt contains a large amount of ******.

There is no shortage of brine and phosphate ore in Liaodong, and it is also possible to experiment with making matches from sulfur ore.

According to the old rules, Gongsun Kang is responsible for proposing principles and ideas, and the specific tests and operations are completed by professionals.

Zhang Huaiyuan, who has become an expert in explosives, is certainly the best choice. Zhang Huaiyuan is already a senior expert, and he doesn't need to do ordinary work himself, and of course he doesn't need to strike iron. He is responsible for leadership and guidance: arranging work and technical guidance.

When Zhang Huaiyuan received this scientific research task, he first set up a scientific research group according to the usual practice. The members of the team are all craftsmen who are proficient in gunpowder making. It is estimated that it will not be long before they can invent matches.

According to records, the earliest matches were invented by the Chinese in 577 AD (a material for ignition, not modern matches), when it was the period of the Northern and Southern Dynasties, wars broke out, Northern Qi suffered from the enemy, material shortages, especially the lack of fire, cooking was a problem, when the concubine and a group of palace maids magically invented matches, but ancient Chinese matches are just a material for ignition.

Zhang Huaiyuan They are better than a group of palace maids, Gongsun Kang thought very confidently.

(End of chapter)