"This crossbow is something that someone thinks about, and it still needs to be tested by his father-in-law and others. If it succeeds, he will give you meritorious deeds and use military merits."

Zhang Jun abandoned Shi Dai, patted the black and gray that could not be removed at all, and smiled and promised the crowd. Now Feng Xiang is the biggest, and he said that he would definitely give him military achievements. The Tang Dynasty's military achievements were rewarded quite generously.

"Thank you, my husband, I will do my best to do my best and never let you down."

"Okay, then, I'm waiting for your good news. Father-in-law, I'm so tired."

"It's a duty, don't do this, my husband."

"This thing, and the scimitar, must be strictly prevented and not leaked during the trial production."

"promise."

Zhang Jun nodded with satisfaction and said to Lin Cheng: "There is a secluded workshop for specialization."

"Don't worry, my husband, I'll make arrangements now." The supervisor immediately responded.

Zhang Jun glanced at the Jiancheng. In this era, the word "Servant" was rarely used, and it was usually the servants and slaves. This Jiancheng was interesting.

I ignored him. If I were loyal and made contributions, I would definitely not be able to lose money to him in the future. I have to watch it slowly.

Zhang Jun went to ask the old craftsman again: "Father-in-law, can you hear about gunpowder?"

"Gunpowder? Never known what it is?"

"Uh... Have you ever heard of the method of subduing fire? The method of subduing fire alchemy?"

"Is what the husband said about Taoism's method of subduing fire and alum?"

"It's just that. I just can't remember the specific name. My father-in-law knows?"

"The old man once saw the Taoist use this method," the old craftsman nodded and recalled: "At that time, the old man was still in Jingzhao. A Taoist priest came to offer this method of subduing fire, which could make fire out of thin air, but there was no place to use it, so he could see something new."

Zhang Jun was overjoyed and slapped his chin: "Does my father-in-law remember the materials you need?"

"It's simple. The Taoist did not avoid the crowd. He only took nitro and sulfone and mixed it with soap horn to ignite it. The eruption was rapid and the smoke spreaded and choked the spleen and lungs, but the time was too short and it was gone in an instant."

"Does my father-in-law know where to get nitr sulfone?"

"This is to find someone to ask. I think it's not difficult. Is the husband urgent?"

"There is no rush, and it's better to find it. It's better to have a large output and can be continuously supplied."

"No, the old man is looking for someone to ask."

"Well, this is a big deal, so you have to be careful. If you ask the origin, you must find out the evidence immediately. If it is true, you must report it immediately."

"promise."

"The reward is not false." Zhang Jun turned his head and said to the chief clerk: "You must implement this matter when you cooperate with your father-in-law."

"No." The chief clerk said his grace.

"Does the husband want to make fireworks? The foolish servant knows a few down-and-out Taoist priests who often do some squirting smoke and mist in the villagers, and can find people at any time."

"Send people to the yamen, be kind, don't be frightened." Zhang Jun nodded and responded to the supervisor's recommendation. Shangguan always gave some opportunities to show his performance. Things are secondary.

"In addition, the coal...carbide production mines can be recorded in detail? If you have a detailed introduction to gold, silver, copper, iron, and carbide ore, you need to know some arrangements. My father-in-law, have you heard of that, black turmeric oil?"

"Black turbulent oil has existed since ancient times, and I have never heard of it since I arrived. However, I have seen and heard many of the counties in Yanfu and the officials have collected it. I have never touched it."

Zhang Jun nodded and found a count in his heart. He was about to leave, but he remembered something again.

"There is another thing. You can try adding a blood groove when you are horizontally blocked." Picking up Shi Dai again and drawing a schematic diagram on the hemp paper: "It doesn't take much effort, but increasing the multiple of the enemy's blood loss can save a lot of effort."

The Tang sword has no blood groove, and it is no problem to stab it with sharpness, but it always takes some effort to pull it out from the body. The human body functions will be automatically clamped after being slandered, greatly increasing the difficulty of drawing the sword.

The blood groove can not only bleed, but also radiate air, allowing the knife to be easily pulled out. Every second on the cold weapon battlefield is life and death. It can increase the speed of the knife and increase the amount of blood release, and can improve combat effectiveness.

After thinking about it, Zhang Jun simply drew another triangular thorn.

"Look at me, this thing is called a spear, a three-edged three-trough groove, which can be used as a spear head. It is like a hole in the middle, and it can easily penetrate the armored polygon armor. It is also convenient to manufacture, just need to be sharp and sharp.

The father-in-law can try to make a few knives, and compare them with the gun and spear. If you make a contribution, you should set up a lot in the army. If the effect is not good, you can produce a small amount."

The triangular spike is not only used for long soldiers, but also very reliable in close proximity. Regardless of whether it can be promoted within the army or not, Zhang Jun planned to get a few of them to spare. He was still a little uncomfortable with the obstacle knife.

At this moment, the soldiers, except for the small countries that are too poor, are all armoured. The technique of chopping and cutting is useful on the battlefield, but it is not very useful. The main thing is to stab, and the barrier knife is much less convenient than the triangular stab.

Although this thing is not as magical as the military buzzers said, it is indeed a good thing, mainly depending on when and where to use it.

The old craftsman collected the drawings and said there was no problem. In his eyes, this thing was quite simple, but no one had done it like this before. From the technology at this time, the manufacturing of triangular spines is definitely simpler and faster than that of a horizontal knife and a barrier knife.

Thanks to the old craftsman and reminds the chief clerk to seize the time for what he does today. Zhang Jun left the workshop.

It was so hot inside that it was a bit too hot even in the middle of winter.

"Go to Xishi for a walk." He stood on the side of the road and looked around, and ordered his personal soldiers to lead the way. He could clearly distinguish between the north and the south, but he could not find the way.

The pattern of the five capitals is exactly the same, but the scale of the attached capital is much smaller than that of Jingzhao Chang'an, and there are all things that should be there.

The East City is generally the luxury market of this dynasty, with rare and rare species. The West City is a market for the people, a large wholesale market, and an international trade market in the Tang Dynasty.

Chang'an is a real international metropolis, and the concept of this international is definitely beyond later generations or even modern times.

There are more than 300 countries that come to Chang'an for exchanges and business, and the number of countries that pay tribute every year is far more than this number. The main reason is that there are too many countries at this time point.

The well-documented territory of the Tang Dynasty, from east to the Yellow Sea, north to the Central Siberian Plateau, west to the Caspian Sea. From east of Kazakhstan, the eastern half of Iran, Afghanistan, Pakistan and part of northern India are all territory of the Tang Dynasty.

The territory here was assigned to the army to establish the Protectorate (Jiedu) Mansion. (From the Japanese collection of the Tang Dynasty territory map)

The actual control scope was wider. At that time, only the Tubo (now Tibet) and the vassal states on the southern side of Tubo were not in the Tang Dynasty, including India, Bangladesh, Myanmar, and most of Thailand.

Vietnam, Cambodia and Laos were both the guilds of Mizhou in the Tang Dynasty. The guilds had 24 guilds of Mizhou in total.

This was the heyday of the Tang Dynasty. After Emperor Wu’s Shenlong Dynasty, the territory shrank and foreign tribes began to become independent.

During the Xuanzong period, the Turks moved westward, the Tubo expanded, the Uighurs grew, the Great Food rose, and the Northeast was divided. By this time by Dezong, Anxi Beiting had become an enclave, and Tubo and Uighurs bordered.

This was the most prosperous period of Tubo, and it was also the honeymoon period of the Uighurs after independence and the Tang Dynasty.

Then the Abbasid Dynasty came, took over the legacy of the Tang Dynasty, and established a huge empire spanning Asia, Europe and Africa. From then on, Central Asia was gradually educated and the traces of the Tang Dynasty were erased.

Fortunately, the Abbasid Dynasty was frightened by the combat effectiveness of the Tang army and was blocked by Tubo, so it did not continue to advance eastward.
Chapter completed!