Zhang Zhao squatted on the ground, holding a special fine iron needle made by the blacksmith who had just been transferred by Li Shengtian, and rubbed quickly on the magnet.

After rubbing about twenty times, Zhang Zhao quickly threaded the iron needle onto a piece of paper with the words "North and South", and then put the paper with the iron needle string into a water bowl held by a miner.

After a few strokes of the iron needle in the water bowl, it pointed in one direction accurately. The onlookers suddenly burst into fierce cheers.

They have tried five times, and each time the iron needle points to the same direction.

Amid the cheers, the biggest obstacle that bothered Zhang Zhao and his team to use the cave blasting method, that is, the problem of tunnel excavation direction has been solved.

This is not a small problem, because if you want to blast a big city like Shule City, the length of the tunnel cannot be short, and people cannot judge the direction in the tunnel, and they may be digging in a way.

In later generations, GPS positioning or laser irradiation can be solved, but it was not so convenient in this era. In the end, Zhang Zhao thought of a way to use a compass to confirm the direction.

In fact, he doesn't care whether he points or not. He just needs to not deflect the direction he points every time.

But it's just such a simple thing that is not even a compass, and it's not easy to come by.

Zhang Zhao searched through Li Shengtian's treasure house until Li Shengtian couldn't help but see it in person, thinking that his nephew was going to pack his treasury, so Zhang Zhao found several magnets in a corner.

"Is this what Guiguzi mentioned in Si Nan? It turns out that it can be made so simple. How did you know how to make Si Nan?"

Cao Yanming opened his eyes wide in surprise, and his whole body was full of exploration.

Recently, Cao Shisi has become a little "arrogant". Since the Divine Fire and Thunder Fire became a fire, he has changed from a noble prince under Zhang Zhao's command and is not popular with others to a mysterious Taoist Cao.

He even looked down on Zhang Zhao a little, saying countless times that Zhang Erlangjun was too obsessed with power and force, and ignored the study of the great way between heaven and earth (referring to studying various gunpowder).

So this morning, Zhang Zhao found a small mistake from him and showed him the use of power and force. In addition to using the unique skill of "making a compass", he greatly impressed Cao Yanming.

Look, Cao Yanming easily changed his name to Zhang Zhao from Zhang Erlangjun to his cousin.

Of course, Zhang Zhao also has a dark history of Cao Yanming. This guy said before that he looked down on Hu Ji, but a few days ago, he quietly touched the room of a beautiful female slave in Ugus. He happened to ask Zhang Zhao to catch him when he was out after he was so happy.

"Sir! With this thing, we can dig directly under the city wall in one road!"

The man named Zhang Zhao is a short man with gray eyes, slightly brown skin, a little purple-red hair, and obviously Sogdian characteristics.

This guy who can speak Chinese, which is not fluent, and insists that he is the guy behind the Tang army in Anxi, is Shi Chongmin, and is the real carbonifer miner leader whom the Sodo team found for him under Zhang Zhao's strong threat.

However, Zhang Zhao felt that this guy should be more like a native of Sogdian Shi, a member of the Jiu surname of Zhaowu.

Now that the three hundred miners have arrived, Zhang Zhao selected 150 people from the poorly ill-equipped miners as agreed, and then selected 150 skilled miners.

Although these three hundred people are far behind the group of miners in the Taiping Heavenly Kingdom in history, they can still basically meet the needs of blasting caves.

These days, while maintaining relatively high standards of food for miners, Zhang Zhao usually starts to provide these miners with a heavy "military training".

Among these three hundred people, 150 were too slaves, and more than half of the other 150 people only recognized Shi Chongmin. It was not easy to tame them completely.

"Since all the final problems have been solved, let's go back and prepare and prepare for the inspection of the Great Sage Emperor!"

Zhang Zhao shouted happily, then pressed Shi Chongmin's shoulder.

"Shi Guzheng, you should add the drawings and text learning of your Jin team as soon as possible!

When can I upgrade to the capital of the Jindu? Who can become a captain of the capital depends on my strength. Even if I am a certain person, it is not easy to break the rules."

When Shi Chongmin heard Zhang Zhao's words, he couldn't help but grin in pain. Mr. Zhang was good at everything, eating well, living well, and dressing well, but this was not good.

Just dig a hole, and you have to learn to recognize words. After learning to recognize words, you have to know how to draw pictures. After drawing pictures, what is even more difficult is to calculate, calculate the excavation speed, calculate the interval between the timber set up, and calculate how many days it takes to dig to the destination.

Zhang Zhao smiled sinisterly in his heart. This was his intention. This kind of illiterate person in his twenties and thirties has been illiterate for half his life. Recognizing words is definitely a very painful thing for them, let alone drawing pictures and calculating.

But he wanted to use this method to form a competitive mechanism among the new 300 miners. If Shi Chongmin is not qualified, he would be very happy to replace Shi Chongmin.

The word "Divine Gold" in the Dividing Team also comes from Zhang Zhao's evil taste.

He only set these 300 people in pairs instead of directly serving as capitals, just to prevent Shi Chongmin from turning these miners into his troops after he became a commander.

If you don't pay attention, maybe Zhang Zhao will become the nominal leader in the end, and his relationship with Shi Chongmin will be like the relationship between the Central Plains Jiedu and the lower general.

This was something that Zhang Zhao could not tolerate, so he deliberately compressed the organization and gave it to a team of 300 talents. He also used the method of recognizing words and taking exams to further weaken Shi Chongmin's leadership over more than 100 miners.

Of course, this also helps him see if he can find several talents from these miners.

In the city of Khotan, in Taihua Palace, Li Shengtian was frowning and reviewing various memorials.

Since seeing the hope of breaking Shule City in Zhang Zhao, under the command of Li Shengtian, the country in the peak state of the oasis city-state in the Western Regions has slowly begun to mobilize.

It has been seventy years since the restoration of Khotan, the greatest desire of the Li family's kings was to break Shule City and possess two of the four towns of Anxi, the former Tang Dynasty.

Especially Shule, this place is really too fatal for Khotan.

If Khotan can conquer Shule City, then this city will become a northbound bridgehead for Khotan and a strong fortress against Ugus, Grolu and other tribes in the north.

On the contrary, if there was no Shule in Khotan, then the Karakhanate in the north could be condescending and constantly penetrated into Khotan.

It can also turn Yaerk (Shache), one of the richest areas in Khotan into a frontline of conflict, making it impossible for Khotan to use this fertile land.

Li Shengtian suddenly remembered a metaphor that Zhang Zhao had given him. If Khotan was a giant turtle, Shule was the tortoise shell of this giant turtle.

But now there is no Shule in Khotan. So a giant tortoise that has no turtle shell and can only expose its soft flesh to the threat of natural enemies. It is a matter of time before it can be supported.

Wait! Li Shengtian suddenly stopped writing and thought. If the Great Jin Kingdom was a giant turtle, then what was the Great Sage Emperor? Gui's head?

"Emperor! Huangmen Minister and Lieutenant Zhang Zhao of Fengtian requested His Majesty to send his inner officer to Yaotougang for inspection. He expected to dig tunnels from three miles away from tomorrow, and ask the emperor to visit Yaotougang in three days!"

The voice of the official entering the rank of the official came from outside the door. When he heard that Zhang Zhao had already started preparing, he instantly forgot what had happened just now. He touched his chin.

Not bad! It seems that this kid wants to show him a more realistic explosion of Shule City!

***The author has something to say***

Thanks to the 2127 book friends for their rewards
Chapter completed!