"It's fine."

After Bo Yu left, Qingji set his eyes on Ah Qing's body again, only to see her open the burden she had been carrying, looking at the things inside, her face was full of joy.

Qingji fixed his eyes and saw that it was all rubble, so he couldn't help but chuckle and said, "Miss Aqing, isn't this a pile of stones?" How do you think of a baby? ”

"That's baby."

Ah Qing pouted and said: "The king doesn't know, my master Mr. Bian Que said that these yellow sand and saltpeter are both medicines that can cure diseases and save people, how can they not be treasures?" ”

“……”

Qingji was stunned for a moment, and Sun Wu, who was sitting on the side, asked with interest: "Mr. Bian Que, the divine doctor who heard about the Central Plains, is your master?" ”

"I had a relationship with Mr. Bian Que, is he okay?"

Ah Qing bowed slightly: "It turns out that you know your teacher. General Sun, to be honest, the family teacher is still staying in Suiguo, if you have time, you can visit him. ”

"Very good."

Bian Que?

Qingji was quite surprised, he remembered that the divine doctor Bian Que in history should be a native of Qin Yue, a person from the Warring States Period.

When he was young, he studied medicine in Changsangjun, passed on his medical skills and forbidden prescriptions, and was good at various subjects.

In Zhao for gynecology, in Zhou for otolaryngology, in Qin for pediatrics, well-known all over the world.

Qin Imperial Physician Li Lishu is not as good as jealousy, but it is to assassinate people......

Could it be that this is a fallacy, Bian Que was a figure in the Spring and Autumn Period?

Sun Wu saw Qing Ji's puzzled look, so he said: "King, this Bian Que's name is Chen Xuan, and he is from Chen Guo. ”

"Because of his superb medical skills, he is considered a divine doctor, so the world borrowed the name of the ancient mythological Yellow Emperor's divine doctor 'Bian Que' to call Chen Xuan."

Hearing this, Qingji suddenly realized, nodded and said, "I see." ”

This Bian Que is not the other Bian Que!

"Bian Que" is a common term for those who were skilled in medicine in ancient times.

According to the legend of the ancients, a healer heals and saves people, and wherever he goes, he brings health and happiness wherever he goes, just like a magpie that brings good news.

Bian Que is obviously a name, and Chen Xuan can get the name of "Bian Que", presumably his medical skills are very clever.

It is not heard of by the princes, but it is famous among the people of the Central Plains.

However, at this time, Qingji's focus is not on Bian Que for the time being.

Qing Ji looked at the pile of crystallized stones like amber in Ah Qing's baggage, the so-called yellow sand and saltpeter.

Not to mention saltpeter, isn't this yellow sand just sulfur?

You know, gunpowder is a mixture of sulfur, saltpeter, and charcoal.

The production process is not complicated, the only difficulty lies in the recipe.

A long time ago, the Chinese ancestors had a certain understanding of these three substances.

As early as the Neolithic Age, people learned about charcoal when they fired pottery and used it as fuel.

During the Shang and Zhou dynasties, charcoal was widely used in metallurgy. Charcoal has less ash than firewood, has high strength, and is a better fuel than firewood.

Sulfur is naturally present and has been mined since ancient times.

People are often exposed to sulfur in their daily life and production, such as the smell of sulfur released from hot springs, and the pungent smell of sulfur dioxide escaping from metal smelting.

The earliest nitrate that the ancients mastered was the soil nitrate under the corners of the walls and the roots of the house.

Saltpeter is chemically reactive and can react with many substances.

Its color is not much different from some other salts, and it is easy to make mistakes in use, and in practice people have mastered some methods of identifying saltpeter.

Whether it is saltpeter or sulfur, it was generally used as medicine in ancient times.

"Fan Zi Jiran" records: saltpeter out of Longdao.

It can be seen that in the Spring and Autumn Period, Huaxia has used saltpeter for people's livelihood.

Aren't this Fan Li and Ji Ran the current ministers of the Wu Kingdom?

Gunpowder was invented by ancient alchemists, from the Warring States period to the early Han Dynasty, the emperors and nobles were intoxicated with the fantasy of being immortals and immortal, driving some alchemists and Taoist priests to refine the "elixir", and gradually invented the formula of gunpowder in the refining process.

It was not until the Tang Dynasty that black gunpowder really appeared, and in the Song and Yuan dynasties, it began to be widely used in warfare.

Qingji was born in Jiangmen and was a graduate of a famous military academy, so he naturally knew how to make gunpowder.

It's just that the final bomb will have an explosion effect, and it is not yet known.

Today, if it weren't for the two things of sulfur and saltpeter, I would have almost forgotten that I could still make such a thing as gunpowder!

"Miss Aqing, where did you get these yellow sand and saltpeter?"

Qingji asked curiously.

"On the banks of the Qingfashui River, there are a lot of yellow sand, and as for saltpeter, there are also caves or stone walls in the mountains."

Ah Qing replied honestly.

"Good!"

After learning that there was a lot of saltpeter and sulfur in this place of Suiguo, Qingji did not dare to slack off, and immediately ordered a thousand soldiers to collect these two minerals everywhere.

No matter how effective the black gunpowder is made in the end, Qingji has to give it a try!

……

With the city, with the city.

Xiong Zhen, the king of Chu, held the battlement with one hand, looking at the coalition camp in the distance, he couldn't help frowning, and his face was full of hesitation.

"Da Sima, the coalition army has been in a row for several days, except for stationing the camp under Suicheng, there has been no change. Could it be that Qingji is brewing a bigger conspiracy, or is he already planning to tie his hands down? ”

Based on Xiong Zhen's understanding of Qingji, the latter is not a person who sits idly by at all.

Shen Zhuliang, who was standing on the side, was also puzzled.

"King, there must be a demon when things go wrong. The enemy army did not move for many days, neither retreating nor attacking the city, could it be that Qingji still had a back hand? The latter Wu army also has a second grain transport team, which is on the way to the place? ”

Shen Zhuliang was not sure.

"Da Sima, you see, what are you doing with so many military tents in the enemy camp?"

Xiong Zhen condescendedly and pointed to the vast area of military tents in the coalition camp, very puzzled.

It can't be that the coalition army lacks even the most basic camp tents, and then let hundreds of soldiers sleep together, right?

Shen Zhuliang had already seen this unusual tent a few days ago, and he couldn't figure it out.

What kind of tricks will Qingji use?

"I don't know."

Shen Zhuliang shook his head and said.

"Kill!"

At this moment, a burst of angry shouts of killing suddenly sounded in the city.

"What's going on?"

Xiong Zhen was taken aback and asked hurriedly.

"Newspaper—"

A junior colonel hurriedly came to Xiong Zhen and said, "King! Big things are wrong! Enemy...... The enemy is in! ”

"What?"

Xiong Zhen was suddenly struck by lightning, and he never expected how the coalition forces outside the city would come in.

"The enemy army is killed from the tunnel!"

Shen Zhuliang suddenly reacted.

He had heard a little that when the Wu army conquered the capital of Han in the past, it used tunnel warfare!