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In time travel novels or film and television works, steel, gunpowder and glass are the three tricks of time travelers.

Let’s not talk about the first two things for now, just talk about glass first.

In fact, glass was invented by the ancients a long time ago. About 3700 BC, the ancient Egyptians had already made glass decorations and simple glassware. About 1,000 BC, China had already made colorless glass. By the current Northern Song Dynasty, commercial glass had actually appeared, and glass had begun to become an industrial material.

However, the glasses during this period were relatively simple low-temperature lead-barium glass.

Due to chemical composition and firing temperature, low-temperature lead barium glass is fryed when it encounters hot water. In addition, it is extremely expensive and therefore cannot be used as a living vessel.

Therefore, glass during this period could only be limited to decorations and was rarely used as dietary utensils, let alone making optical glass.

but--

Although the glass process is not mature now, due to the needs of commodities, craftsmen who burn glass have actually appeared during this period.

Cai was still planning to open a glass manufacturing factory to make money, so he recruited some craftsmen who burned glass.

Later, Cai still learned that his soap was sold, so he ran aside the idea of ​​opening a glass manufacturer.

But although Cai still did not open a glass manufacturing factory, he did not stop research and development of glass.

Cai still did this, first of all, naturally, to leave a way out for himself. After all, it is not impossible to put all eggs in one basket. Secondly, in addition to helping Cai Huan make money, glass can also bring other practical uses to Cai Huan.

For example, a telescope.

As long as you have a telescope, whether it is a marching provocate, a confrontation between the two armies, or arranging troops, it can make the officer's command more powerful. You can predict the enemy first and respond calmly before you can stand invincible.

In fact, those who know glass are not difficult.

Moreover, the raw materials for making glass are very easy to find, even in the Song Dynasty.

Quartz sand: Quartz sand is quartz particles made of quartz stone. It was mined and used by ancient people a long time ago - it is an important raw material for ceramics. Therefore, as long as you find the place where the ceramics are fired, you can find quartz sand.

Limestone: This one is made of walls and is easy to find.

Feldspar: The most important rock-making mineral for surface rocks. Don’t worry about what they look like. It is also an important raw material for ceramics.

Soda ash: also known as sodium carbonate, also known as soda, lumbaline, tartar, and oral alkali. It is widely used in printing, dyeing, leather making, and edible. It has been used by the ancients for a long time.

Next is the manufacturing process.

Ingredients, melting, forming, annealing.

Cai has watched this program at least hundreds of times.

Even if Cai still hasn't practiced it himself, he will definitely be able to burn it out after repeated experiments for a while.

As for grinding glass, it was even more so that the Qi Kingdom had superb crystal grinding and polishing technology as early as the Spring and Autumn Period, and ancient crystal products were always produced. Therefore, it is of course not difficult to find professional craftsmen.

In a word, under the guidance of Cai Shen, the first batch of telescopes in the world have appeared and have been armed to the hands of the soldiers of the Jinwu Army and Tabai.

And there is another thing that is born with the telescope - glasses.

...

After several attempts, Cai finally debugged the appropriate lenses for Liang Shicheng.

Don’t be ignorant of eunuchs, and don’t think that treacherous ministers have no talent.

wrong!

At least Liang Shicheng is an exception.

At this time, there has always been a legend that when Su Shi was exiled, he sent his maid to a friend of Liang and gave birth to Liang Shicheng in less than the term.

Liang Shicheng also called himself "Su Shi's son" and "Su's body".

The key is that the Su family has never denied it.

It is said that Liang Shicheng took into account his brotherhood and even said to the account room at home: "Anyone who pays for Xiao Su is less than 10,000 yuan, you don't have to sue me, just pay it as much as possible."

The real "confirmation" that Liang Shicheng was Su Shicheng's son, Liang Shicheng had taken the imperial examination and won the seventh place with his strength.

People in the world say that if Liang Shicheng was not Su Shishi's son, how could he be admitted to the Jinshi?

In fact, Su Shi's scientific examination results were not as good as Mr. Liang. Su Shi was admitted to the B degree, and Mr. Liang was admitted to the A degree, and the difference between the two was not a little bit.

However, Su Shi was so famous that the world passed on Liang Shicheng's own efforts to Su Shi's genes.

actually--

It is very difficult for Liang Shicheng to reach this point today. It can be said that he has made countless hard work behind his back to become his current hidden appearance.

It is precisely because Liang Shicheng has worked so hard that Liang Shicheng has been myopia decades ago, and it is getting worse and worse. Now it is even here, with hermaphrodites three meters away, and people and animals outside ten meters away.

To apply a limerick from the Ming Dynasty:

Xiaojun's eyes are so strange.

Zili asked who is next to him?

The sun is passing through the window lattice and holding a marble,

The moon moves flowers and shadows to pick up firewood branches.

The nose was damaged by looking at the wall.

Clamping eyebrows for the lock book box.

There is something more laughable,

Blowing the light to burn the skin of the lips.

This kind of pain that cannot be seen clearly is simply in words.

Let me put it this way, when Liang Shicheng was young, he loved reading and even reached the point where he was always indifferent to books. Now, because of his high myopia, he can no longer read by himself, so he can only let the children read it to him.

Therefore, as soon as Cai Shen showed Liang Shicheng the magic of glasses, Liang Shicheng became expectant. When Liang Shicheng couldn't wait to put on the glasses that Cai Shen had debugged and saw clearly this world that he had not seen clearly for decades, he was as calm and experienced as Liang Shicheng, and couldn't help but shouted to Liang Bingcong excitedly: "My son! Come here quickly and let the father see you!"

After hearing this, Liang Bingcong hurried to Liang Shicheng and said, "Sir, the child is here!"

Liang Shicheng held Liang Bingcong's big pie face and said, "So that's how my son is. Well, he looks so handsome like when I was young!"

Cai, who was standing beside him, suddenly felt black in his head and thought to himself: "Even if Liang Bingcong is like this, can he have something to do with 'Jung-lang'?"

When Liang Shicheng slowly calmed down, he finally felt a little head-heavy and the feeling of being unable to grasp the distance. He hurriedly asked Cai Jian: "Nephew, why did I feel a little dizzy after wearing these glasses? I won't always be like this, right?"

Hearing that Shicheng Liang called himself "nephew", Cai Shen immediately beat the snake and said with a stick: "Uncle, don't worry, this is because Uncle just wore glasses and was not used to it. When Uncle got used to it, he would no longer have these feelings."

Liang Shicheng said happily: "Okay, okay, I won't feel like this all the time!"

In fact, after entertaining so many people today, Liang Shicheng was already very tired. When he met Cai Jian, he was entirely because of Liang Bingcong's face, and he didn't want to make Liang Bingcong lose his trust.

In fact, according to Liang Shicheng's original plan, he would like to see Cai Jian, encourage him, and then give an order to expel him.

Unexpectedly, Cai Shen actually gave Liang Shicheng a pair of customized glasses, allowing Liang Shicheng to see Guangming again.

In this case, how could Liang Shicheng directly issue an order to expel Cai Jian?

Liang Shicheng said in an elder tone, "I have been in the same dynasty as your father Cai Shaobao for many years, and I know his talents very well. It's a pity... In the future, if you have anything, come to my house to find me. You should also contact Cong'er and get close to you. We are old and will belong to you young people in the future."

Cai still said respectfully: "My nephew and Brother Liang hit it off at first sight, so they naturally have to get close to each other. If my uncle doesn't bother me, I will come to see my uncle again when I return from this war."

"fight?"

Liang Shicheng was slightly stunned!

It’s not a big mistake for Liang Shicheng to not know Cai Jian’s situation. It’s really that Cai Jian is too insignificant in the eyes of Liang Shicheng, a powerful minister who is in power. Therefore, how could Liang Shicheng spend his precious energy and time on Cai Jian, even if Cai is still Cai Bian’s son, even if Cai is still a member of the Cai family.

Let me put it this way, if Cai Shen had not taken the lead with Liang Bingcong's line, Liang Shicheng might not have noticed Cai Shen. If Cai Shen had not given Liang Shicheng a pair of glasses that could allow Liang Shicheng to see the light again, Cai Shen might not even have the qualification to ask Liang Shicheng to ask about his identity.

Liang Bingcong was also a shiver. Seeing that Liang Shicheng didn't know that Cai still abandoned Wen and followed the martial arts, he interrupted: "Although Ziyin is the fourth in the undergraduate degree, he did not choose to follow the steps, but abandoned Wen and followed the martial arts. He is now the commander of Jinwu Guard."

"The commander of Jinwu Guard?"

Liang Shicheng reacted for a long time before he realized what position Cai still had.

Liang Shicheng frowned and said, "Teacher Cai is not such a kind-hearted person."

Cai still hurriedly said: "This matter has nothing to do with my nephew and uncle. My nephew and uncle want me to serve as the county magistrate of a county. It was my nephew who insisted on abandoning literature and following martial arts. My nephew asked me to command the Jinwu Guard in order to mobilize my nephew's character."

After Cai still said this, Liang Shicheng understood. He asked, "Why did the virtuous nephew abandon his civil and military affairs?"

Cai was still helpless and could only tell Liang Shicheng what he said to Cai Jing and others, what he thought the national war might start. The warriors might do more things that might be able to do.

After hearing this, Liang Shicheng said, "The nephew is really a bit unique."

After thinking about it, Liang Shicheng said again: "In recent years, I have collected a lot of weapons and armor. I will ask Cong'er to accompany my nephew to choose a set, even if it is a gift I gave to my nephew."

Cai still hurriedly refused: "How dare I accept the honorary gift from my uncle?"

Liang Shicheng waved his hand and said, "Since my nephew abandons literature and goes to martial arts, I guess he has a good martial arts. Those weapons and armors are not considered as insulting them. It is better than keeping dust in my warehouse."

After saying that, Liang Shicheng did not give Cai Jian the chance to refuse again. He said, "The elders give you, you must not refuse, just take it." Then he directly ordered Liang Bingcong, "Cong'er, take Liulang to choose."

Liang Bingcong heard the words and reached out to Cai, saying, "Please, Brother Cai."

Seeing this, Cai still had to say goodbye to Liang Shicheng, and then went to Liang Shicheng's military and armor warehouse with Liang Bingcong.

At first, Cai still didn't take Liang Shicheng's rebate seriously.

But when Liang Bingcong opened Liang Shicheng's military depot, Cai Jian's chin almost fell off!
To be continued...