"Master, what is chemistry?" In a school hall in Quanzhou City, a teenager named Ding Weiyuan asked Li Sanjian.

The Song Dynasty "promoted literature and education, suppressed military affairs", so since the Song Dynasty, it has respected the Confucian ethical program, respected Confucius and Confucianism, promoted learning, propaganda and education, and promoted the imperial examination.

The Song Dynasty made three large-scale missionary activities.

The first large-scale Xingxue mission in the Song Dynasty began in the fourth year of Emperor Renzong of the Song Dynasty, so it was named "Qingli Xingxue", which was presided over by Fan Zhongyan.

The second large-scale Xingxue mission of the Song Dynasty was during the reign of Emperor Shenzong of the Song Dynasty, so it was named "Xining Xingxue", which was presided over by Wang Anshi.

The world-famous "three-rounding method" was founded by Wang Anshi.

The third large-scale mission of the Song Dynasty was proposed and presided over last year, that is, the first year of Chongning, by Cai Jing, the old man of Taishan of Li Sanjian.

Cai Jing took the school as the priority of today, begged the world to juxtapose the scholars, and proposed the promotion of learning, so it was named "Chongning Xingxue".

This year, that is, in the second year of Chongning, the edict was established in each state capital to promote the Department of Learning, referred to as the "Department of Learning", which was in charge of the school education affairs of the state government, and the annual inspection department, in order to examine the advantages and disadvantages of teachers and Confucianism, and the diligence of students, and to use this matter as the basis for the investigation of the governors of the prefectures, and to evaluate the performance of the governors of the prefectures.

Quanzhou is no exception, and Li Sanjian is also inextricably linked.

Although Li Sanjian had a lot of criticism about Cai Jing, he still quite agreed with his move to promote education and education, and responded positively.

Li Sanjian came from a humble background, and it was not easy to read when he was a child, so he was deeply sympathetic to people from poor families who could not afford to read, and hoped that all poor people in the world could read and learn calligraphy.

Quanzhou sentenced Cui Yongzi to concurrently serve as the director of the promotion and promotion of learning, and Li Sanjian, the governor of Quanzhou, just found his spare time to teach in Quanzhou School.

But even so, Li Sanjian also accepted more than 20 disciples, all of whom were homeless teenagers in their teens who were ordered by Shankui.

Ding Weiyuan is also one of Li Sanjian's students.

Song respects the teacher's heavy teaching, apprenticeship is not so casual, just kowtow to the two ends is over, you must hold a certain ceremony to officially become a master and apprentice, and also attach great importance to the relationship between master and apprentice, one day as a teacher, a lifetime as a father, sometimes the relationship between master and apprentice is even closer than the relationship between father and son, father and daughter. Martial apprentices without papers must perform the apprenticeship ceremony and the "six rites" of the apprenticeship.

The so-called "six rites" refer to the six rites of cultivation, that is, the six kinds of gifts given by the disciples to the master during the worship ceremony, namely, celery: the meaning is diligence and studiousness, and the industry is good at diligence; Lotus seed: Lotus seed is bitter, meaning painstaking education; Red beans: meaning red luck; Red dates: meaning early in high school; Longan: It means the perfection of merit; Strips of dried lean meat: to express the disciple's heart. Among them, the word "Shu Xiu" refers to ten strips of dry and lean meat.

Etiquette such as these is extraordinarily complicated.

At that time, Li Sanjian worshiped Su Shi as his teacher, but because of the hard life in Danzhou, Qiongtai, so everything was simple.

At this moment, Li Sanjian, as the governor of Quanzhou and the secretary of Quanzhou City, is responsible for the military, government, and civil affairs in Quanzhou, and also serves as the official matter of lifting soldiers and inspecting Quanzhou, Zhangzhou, and Nanjianzhou on Fujian Road.

More than 20 homeless teenagers, it is impossible for them to come up with the gift of apprenticeship.

These teenagers are homeless and have no food and clothing, but they are not only taken in by Li Sanjian, but also accepted them as disciples.

"Chemistry is 'golden pill' or 'alchemy'... At present, Li Sanjian can only explain it like this, so he smiled slightly and said: "That is, the smelting and alchemy of gunpowder, ceramics, papermaking, and metals." ”

"I'm going to do something fun, called 'Charcoal Dancing.'" Li Sanjian then took out a glass bottle and placed it on the wooden shelf.

Li Sanjian took another paper bag, opened the paper bag, pointed to the powder in the paper bag and said: "This is fire nitrate or soil nitrate, do you know how it came from?" ”

The more than twenty disciples in the audience shook their heads together.

"You're all coming up and seeing." Seeing this, Li Sanjian smiled and said to the disciples.

Hearing this, all the disciples walked to Li Sanjian's side together, looking at the powder in the paper bag curiously, and a disciple named Xu Zhen also twisted the powder and sniffed it under his nose.

"Oh, it stinks, Master, why does it stink?" Xu Zhen asked in confusion.

"Master, this thing seems to come from a latrine?" A disciple named Liu Zongyi also asked in confusion.

"Haha!" Li Sanjian laughed when he heard this: "Has Zong Yi ever seen this thing? Yes, this thing comes from the latrine... Fire nitrate or soil nitrate can be made with nitrate and plant ash as raw materials. Nitrate soil is generally found in latrines, pig and cattle pen houses, old wall feet in courtyards, cliff edges, caves and ground that is not easily washed by rainwater. The nitrate soil is moist, not easy to dry, and turns slightly purple-red after being exposed to the sun. A good nitrate will spark when placed on red-hot charcoal. ”

"Master, what's the use of fire or earth?" A disciple named Han Ningzheng asked.

"Good question!" Li Sanjian praised it and then said: "There are many uses, you can take a look first." ”

Li Sanjian then put the nitrate powder into the glass bottle, and took an oil lamp and placed it under the glass bottle to heat it.

The soil nitrate began to melt into a liquid when heated, and Li Sanjian took a few small pieces of charcoal and threw them into the glass bottle.

After a while, the little charcoal was on the surface of the nitrate liquid, and suddenly jumped, sometimes jumping up and down, sometimes flipping itself, as if dancing, and also emitted a burst of hot red light, which was very beautiful.

All the disciples were attracted, excitedly watching the "charcoal dance" and constantly whispering.

"It's chemistry!" After half a ring, Li Sanjian said.

"Master, what is a chemical reaction?" At this moment, all the disciples asked in unison.

"This..." Li Sanjian thought for a while and replied: "Two objects, two objects are tiny components of one thing, and under certain conditions, they will break and rearrange and combine, and the process is called a chemical reaction. When the small charcoal is just put into the bottle, the temperature in the bottle is still low, and the small charcoal is not yet burned, so the small charcoal is quietly lying on the soil nitrate, as the temperature in the bottle rises, the small charcoal burns, and at this moment it has a fierce chemical reaction with the soil nitrate, and releases a large amount of heat, so that the small charcoal immediately burns and heats, and jumps endlessly. The reason is that under the high temperature, the soil nitrate releases a kind of thing, called 'oxygen', and the reaction of oxygen and small charcoal produces a kind of thing, called 'carbon dioxide', which is a kind of gas, and the gas will lift up the small charcoal and make it leap endlessly. ”

When all the disciples heard this, they all nodded as if they didn't understand.

Seeing this, Li Sanjian couldn't help but sigh secretly in his heart.

Li Sanjian knew in his heart that if he wanted to learn "alchemy", he must have a certain foundation, but where did Li Sanjian have the time to start from the most basic teaching?

Li Sanjian could only analyze the truth from some obvious phenomena and teach them to his disciples, and at the same time, Li Sanjian also wrote some books for them to learn from their books, and it was up to them to learn to what extent.

Of course, they have questions, and Li Sanjian can answer them in a targeted manner.

Among them, Li Sanjian's knowledge in his belly is also very limited, Li Sanjian just hopes that he can become a guide, and he just hopes that his more than 20 disciples can become a fire, and after a long period of time, they can burn.

A spark can start a prairie fire!

"You all know about fireworks, right?" Li Sanjian then asked the disciples.

"The disciple knows that the disciple's family was originally a fireworks craftsman." A disciple named Tang Shun replied.

Tang Shun is only fifteen years old this year, and his family was originally a fireworks craftsman, but due to the plague, all the people in the family passed away, leaving only Tang Shun alone, whose life experience was extremely pitiful, so he was taken in by Li Sanjian.

"Why do fireworks glow? It is because of the effect of gunpowder, and the main raw material in it, which is fire nitrate or earth nitrate, is through a chemical reaction, it will shine and heat. Li Sanjian nodded and continued: "If you improve its formula, maybe it will be even more powerful, so powerful that you can't even imagine it." ”

Li Gang, who came with Li Sanjian, couldn't help but nod secretly when he heard this.

Li Gang has always been interested in gunpowder.

"I know, the gunpowder workshop in the original disciple's house once killed a handful of people, the power is so scary." Tang Shun said to Li Sanjian when he heard this.

"Kill someone?" Li Sanjian patted Tang Shun's head and said with a smile: "Real gunpowder can kill thousands of people at a time." ”

"Thousands? Are you sure? Li Gang couldn't help but be surprised when he heard this.

"Can there be a fake?" Li Sanjian glanced at Li Gang and said.

"The knowledge that Li has given you may not be of much use at the moment." Li Sanjian then ignored Li Gang and said to the disciples: "For the imperial court tribute, it is even more useless, and it cannot help you pass the imperial examination at all, but these learnings, in the future, may take a long time, they must be useful, and the usefulness is greater than you imagine. ”

Studying etiquette, reading scriptures, and making articles in order to prepare for the imperial court's tribute, there are Cui Yongzi and others to teach, and Li Sanjian doesn't want to do it too much.

"Teacher, the disciples don't want to be officials in the imperial examination, they just want to serve by the teacher's side in this life." After all the disciples glanced at each other, they bowed to Li Sanjian together.

"If you want to follow the teacher and do your studies, you can do it." Li Sanjian nodded when he heard this: "But for Li's disciple, it is not so easy, not only to learn the truth, but also to be healthy, so while studying, you also need to strengthen your body and temper your will. ”

"Disciples follow the teachings of the teacher!" All the disciples prayed together again.

"Well, then open the book now." Li Sanjian then said: "What is mathematics? That is, 'gap volume', 'circle technique'。。。。。。 ”

So Lang Lang's reading sound came from the Quanzhou School.

At this time, a family member of the Taishou Mansion hurried to the school, but saw that Li Sanjian was teaching, so he didn't dare to disturb, just waited outside the school, waiting for Li Sanjian to finish teaching on this day.