Time flies, and the moon passes by, and a year has passed in a blink of an eye.

In the past year, Qingshanzhai has not changed much except for the knowledge changes in the villagers.

The change in Qingshan Village was in Fang Nan's plan. A year later, Fang Nan was only thirteen years old. Even though Fang Nan was very extraordinary in the hearts of the villagers, it was not as convincing as all the villagers.

Fang Nan’s plan is to build ideas for all students in three years, influence their elders through these students, and then control Qingshanzhai. It has only been a year since the education of students. Only in the second academic year will Fang Nan slowly guide the students’ thoughts.

Qingshanzhai has not changed much, and Fang Nan does not do much. Every day, in addition to teaching Hu Xiaoya and students, he is drawing drawings. Fang Nan has already placed a lot of drawing drawings in his portable space, including drawings of muskets and cannons, simple machine tool drawings, and simple steam engine drawings.

As long as you have skilled carpenters and blacksmiths, you can spend some time creating the things on the drawings.

In addition, Fang Nan also spent some time studying black gunpowder.

Anyone who has been to junior high school should know that the formula of black gunpowder is very simple, it is mixed with sulfur, saltpeter and charcoal.

Gunpowder originates from alchemy and is a by-product of alchemy. However, the alchemy methods do not pay attention to gunpowder. What they pursue is to refine elixirs that can make people immortal.

According to the "Nine Kingdoms" by Lu Zhen in the Song Dynasty, during the reign of Emperor Ai of Tang (the tenth century), Zheng Wangfan led his army to attack Yuzhang (now Nanchang, Jiangxi), and "fired fires" to burn the city's Longshamen. This may be the earliest record of using gunpowder to attack the city.

The birth of gunpowder led to the emergence of firearms. In addition to the two long-range weapons, bows and crossbows, there were also powerful long-range weapons such as firearms. Since the Tang Dynasty, the application of firearms increased in various dynasties. By the Ming Dynasty, the application of firearms reached the peak of the "old era".

The raw materials for manufacturing black gunpowder are very simple, and Fang Nan can also do it in Qingshan Village, so Fang Nan spent some time collecting raw materials and studied the preparation of black gunpowder for a little.

The three raw materials of sulfur, saltpeter and charcoal are good, sulfur and charcoal, but saltpeter is a little troublesome. The large-scale application of firearms by the Ming Dynasty army required a large amount of gunpowder, which shows that there is no shortage of saltpeter ore on the land of China.

"The Book of Things in Heaven" records: "All the Chinese and the barbarians are born, and China specializes in the northwest. If the southeast seller does not give official guidance, he will be punished for his private goods."

Due to the importance of saltpeter, the Ming Dynasty controlled saltpeter. It was very difficult for Qingshanzhai to buy saltpeter from the outside world. What's more, Qingshanzhai did not have any extra money to buy saltpeter, so Fang Nan could only use another method to get a small amount of saltpeter for the time being.

Saltpeter in nature is often formed by decomposing nitrogen-containing organic matter in the soil under the action of bacteria, oxidizing it into nitric acid and combining it with potassium in the soil.

So whenever the autumn season is clear and cool, it usually precipitates out in the shape of a shell or salt flower, covering the ground and the foot of the wall. This is called ground frost, especially in pigpens, stables, and toilets.

Sweep the soil block containing nitr, place it in a barrel, soak it in water, and filter it, boil or dry the filtrate to obtain saltpeter crystals.

This method can obtain a small amount of saltpeter. Occasionally, in physical education classes, Fang Nan will take the students to collect soil containing nitr everywhere in Qingshan Village, and then process it to obtain saltpeter.

When studying black gunpowder, Fang Nan would also choose students who are interested in black gunpowder as assistants. However, in order to prevent accidents, when studying black gunpowder, Fang Nan prepared less black gunpowder every time, and even if it exploded unexpectedly, it would not cause much harm to people.

Choosing students as assistants is to consciously cultivate scientists and develop science and technology. It is not enough to have only Fang Nan. The science and technology tree of a country involves a very broad range of aspects. Fang Nan can set the main trunk, but the branches and branches require the efforts of other scientists.

Scientists and managers must have them. In fact, when Fang Nan educated the first batch of forty-two students, he consciously gave different training directions according to the students' talents.

For example, the squad leader Zhou Shitou (nickname), now named Zhou Lei (daming), initially chose Zhou Lei as the squad leader, but in fact he was just a temporary squad leader. If Zhou Lei's performance made Fang Nan dissatisfied, Fang Nan would choose a new squad leader. After a year, Zhou Lei's performance was very good and fulfilling the squad leader's obligations also show that Fang Nan's choice was not wrong at the beginning.

Zhou Lei manages his class very well. It can be said that Zhou Lei has management talent and is suitable for becoming a manager like an official.

For example, Hu Zhuang, now Hu Zhuang is a sports committee member of the class. Fang Nan believes that Hu Zhuang is suitable for being a general who commands thousands of troops.

There are also male study committee member Wang Mu and female study committee member Xu Yueer. Their academic performance is the best among male and female, and they become study committee members. They are very suitable for becoming scientists.

As for the study committee members, it is better for men and women to teach and receive relatives, and children are better. In this era, men and women can get married and have children at the age of sixteen or fourteen, which is equivalent to adulthood. A year has passed, and many of Fangnan’s students have reached the age of getting married. There are indeed no too many contacts between boys and girls. This is the limitation of the times.

So there are two study committee members: boys have learning problems and girls have learning problems, so that they can avoid the problems of contact between boys and girls.

In addition, regarding the issue of appropriate-age students getting married and having children, Fang Nan gave the boys a "biology class" and Hu Xiaoya also gave the girls a biology class.

The biology class mainly talks about getting married and having children. Girls' bodies are still developing when they are fourteen years old. Now getting married and having children will cause considerable damage to their bodies. The direct result is a reduction in lifespan. Girls must at least have children after they are eighteen years old.

After the biology class, the boys went back to tell their fathers, and the girls went back to tell their mothers that this knowledge came from Fang Nan and was very credible. Getting married early will damage the body and reduce lifespan. This is a big deal. Having a child a few years later is just a trivial matter. Parents agree that their children get married and have children later.

So in a short time, no newcomers will get married in Qingshan Village.

There are also things about names. People in Qingshanzhai are more casual, such as Ergou, Big Tiger, and Big Niu. The main reason is that they are illiterate and can name them casually.

As students become more literate, many students start changing their names. The main thing to change their names is Hu Xiaoya. Xiaoya becomes a nickname, a name that can be used by relatives and familiar people. Daming name becomes Hu Xiaoya, which is Fang Nanqi, and is used in formal occasions.

The names are all named by elders, and Fang Nan is a teacher and their elders, so students who need to change their names are all named by Fang Nan. The original names will not be discarded and used as nicknames.

Such a name change has also been recognized by the students' parents. At least the names given to the children are still there, so they don't care about big names.
Chapter completed!