Some of the water inlets on the ground are relatively simple, but those buried underground are more troublesome from the city to the Luo River. First, you need to find a good location, and secondly, you need a large number of civil engineering projects.

Gunpowder, or artillery?

Zhang Liao thought about it and shook his head again.

The cannons that had been tested with cannons before, which could easily destroy Cao Jun camps, were defeated in front of the rammed earth walls of Luoyang City.

As the original Kyoto of the Han Dynasty, Luoyang City was several times stronger than ordinary county and county cities. Solid bullets could destroy city gates and battlements based on kinetic energy alone, but it was not so easy to directly destroy the city walls by relying on artillery. So now for Zhang Liao, it is always good to have a new attack channel.

If the East Gate Crouchi can pass, then Zhang Liao could find an opportunity to send a group of people into the city, and then cooperate with each other at the right time, so that he could take down Luoyang City at the lowest cost.

But all plans are based on the accuracy and truth of these two consecutive books...

This made Zhang Liao feel a little worried.

According to the tutorials in the martial arts hall, all combat plans cannot be stolen. It is not a good thing to bet on the Dongmen nando by all the battles.

Moreover, Zhang Liao also needs to consider whether it will be a trap set by the mangirl in the city.

After a while, the guards summoned more than ten soldiers with good water properties to the tent.

Zhang Liao lifted the curtain of the tent, walked out, looked over one by one, and said, "Tonight, I need you to do something..."

...

...

『What? Rotation?』

Wang Yun stared at him, as if he didn't believe in his ears.

The messenger said impatiently, "Yes! Rotation! Rotation of four doors in three days! Follow the order of the envoy! Get it clean up early! Save the trouble of getting it done!"

Wang Yun swallowed, "Then, which door should we change to?"

The messenger rolled his eyes, "Oh, Junhou, ask me? Can I, a soldier, decide this? I left! I really ran away and didn't even have to take a sip of water..."

Wang Yun then realized, and hurriedly stepped forward and pulled it, stuffed something to the commander.

The messenger nodded and left with satisfaction, no longer silenced anything.

The messenger left, but Wang Yun became worried.

The head of the military academy came over, "What's going on?"

Wang Yun sighed, "Three days later, I will change my defense..."

『Defense change?!』 The head military academy widened his eyes, 『Then...then...then what should I do?』

Wang Yun sighed long, sat down against the female wall, and whispered, "What else can I do? Alas... I can't resist the orders, right? Now, it's all over..."

All Wang Yun's plans were prepared around the East Gate hibernation. If he changed to another city gate, it would mean that all his previous preparations would be in vain.

Not to change?

Is it possible?

What reason should I not change it?

Wang Yun was filled with sorrow and frowned. After thinking for a while, he couldn't come up with any good idea.

The head military academy said: "Other... forget it... this is all fate..."

Wang Yun leaned blankly against the female wall and looked up at the sky.

The white clouds float slowly and freely, stretching their bodies.

"No...I don't want to hit you again..." Wang Yun murmured in a low voice, as if the fatigue emanated from the bones in his body, "I'm tired... so tired..."

The head of the military academy stretched his head and looked around, "What should I do? You can't just rely on us...or we...slide down from the city?"

"Do you have a rope?" Wang Yun raised his eyes to look at the military academy of the head of the army.

The head of the military academy uttered and shook his head, "No. The ropes are all in the back camp, and the central guards are all under the supervision..."

"Then what else were you talking about?" Wang Yun muttered dissatisfiedly, "What should I do, what should I do?"

"No, I'll give them another..." The head military academy turned his head slightly, "I'll shoot them another letter and say I'll change my defense... Either that's what's the case within three days... or I'll have to wait for the defense..."

Wang Yun let out a long sigh, "Okay, that's all..."

...

...

Zhang Liao was watching the simple sand table made by the craftsmen based on the reports reported by the soldiers.

City gate.

The culvert under the city gate.

And the offensive line outlined with the arrangement map.

The corridor.

The location of soldiers stationed in the city.

A little bit of thoughts slowly gather into a whole plan.

After investigation by soldiers with good water quality, there is indeed a crypt where the east gate can connect to people.

The railings in the culvert are indeed as mentioned in the book. Some of them have decayed and are temporarily reinforced with short spears and mixed iron...

Although there is a section in the middle of the culvert that is underwater, if both ends of the moat are cut off outside the city, the water in the culvert will flow out, forming a passable passage. This will obviously be easier than solving the problem from the direction of the Nanmenluo Water.

But the moat is under the nose of the defenders, so if you have to take action, you can only take advantage of the night to join the Tiansai moat in one breath, cut off the water flow, break the iron railings of the culvert, and then rush into the city...

At the same time, such actions will obviously bring unconcealed movements. Therefore, Zhang Liao also needs to arrange troops in other directions to cover them, at least as a restraining force, so that the defenders in the city cannot detect any abnormalities at the first time, so that the overall plan can be successfully implemented.

The military academy also stood by the sand table, gesturing and discussing.

"You can use a wooden cart to transport mud bags and push them directly into the river..." A craftsman pointed to the moat and said, "This way you can cut off the moat in as soon as possible... It means that there are more wooden carts and mud bags..."

"The silt in the culvert can carry hay and wooden boards, and make progress all the way! You only need to be able to keep your legs and feet accelerate your passage!"

"Yes, yes, there are also artillery cannons here, bombard the city gate tower, create sounds, and attract the attention of the defenders!"

"besides……"

Just as the military academy was talking happily, soldiers suddenly came to report.

"General! Another letter from the city is published!"

...

...

Under the dim light, the officials sent by Man Chong came to report one by one.

It's like a wandering soul hiding under the shadow.

Among the reported matters, there are some things that are irrelevant. Man Chong did not scold him, but just nodded, allowing these officials to continue staring at him...

But when Xu Zhengli reported that he saw Wang Yun staying on the city for a long time while patrolling at night, he was a little panicked...

Man Chong's eyes condensed slightly.

Although the Junhou of the North Gate also shot out, the guy had slept in the city gate building before. After being awakened, he was a little overreacted. Although there was something wrong, it was understandable.

But Wang Yun patrolled the city in the middle of the night for several consecutive days?

Wang Yun is so diligent?

So why haven't you done this before?

『Haha... I caught you...』
Chapter completed!