Walking along the city wall, he slowly walked around and touched the rough loess rammed earth city wall. From time to time, Li Mengxi could still feel the texture of the wheat straw in the rammed earth city bricks.

It is said that in ancient times, when building a fortified city, egg whites were mixed with lime, clay, and glutinous rice juice to make Sanhe soil. A city built with Sanhe soil would last for a hundred years and would be extremely strong.

Using egg whites and glutinous rice juice must be very expensive.

According to Li Mengxi's observation, the city wall of Wen'an County was not built with Sanhe soil, but only with the ordinary rammed earth method.

It seems that the real majestic city can only be seen in border areas, military locations, or state capitals.

Rammed earth wall, also known as earth wall, Li Mengxi had seen this kind of wall in his previous life.

My grandpa’s house was first built with earthen concrete. I don’t remember whether it was hot or cold in the earthen house. It just leaked. Whenever it rained, my grandfather would use a big plastic basin to catch the rainwater in the house.

Moreover, earthen houses are prone to attract rats and insects.

The best soil for making soil embryos is yellow mud, and the best yellow mud is the yellow mud from the river.

River land is the land close to the river. Every summer when there is a flood, the water will overflow the high embankment and deposit all the silt in the river into the land near the river embankment. Therefore, the river near the river will

The land is more fertile.

According to Grandpa, river land is the best land. The mud in the river land will not stick to your feet when it rains. But in the hills far away from the river, the mud in the hills will stick to your shoes.

Just like that, regardless of the upland sticky shoes, the soil embryo made of upland mud is not as strong and reliable as the embryo made of river mud.

To make soil embryos, you first need to find good yellow mud, preferably under the surface soil and without debris. Then use a wooden board to make a mold, chop the wheat straw, mix it with the yellow mud and add water, and mix it with the wheat straw.

Pour the yellow mud from the rod into the mold, and then beat it with heavy objects to compact it to press out the shape of the brick.

Then dry the prepared brick embryo in the shade or sun, and the brick embryo is ready.

Yellow mud and wheat straw are ordinary things, but when they are mixed together, magical changes occur.

Mud bricks with wheat straw added will not crack and are very strong. The house built can last for at least ten to twenty years.

Looking at the embryonic bricks on the city wall, Li Mengxi couldn't help but think of the past.

Until the sound of footsteps behind him interrupted Li Mengxi's memories.

When I looked back, I saw that it was Liu Bei's personal soldiers.

"I'll go down in a while." Li Mengxi said to his soldiers.

The tall and thin soldier smiled and scratched his head, "I didn't come here to call. The general said that the city wall was steep and he was afraid that the military advisor would fall if he didn't pay attention, so he sent me to look after the military advisor." The soldier said with a kind smile.

Li Mengxi was stunned when he heard this, and then he couldn't laugh or cry.

"Thank you!" Li Mengxi politely thanked Liu Bei's soldiers, "Let's go forward and walk around the city."

Li Mengxi walked along the city, actively looking for topics to talk about, and chatting with Liu Bei's soldiers as they walked. After walking for a while, Li Mengxi stopped when he reached the stairs.

The ladder of the city wall was built on the back of the city wall, close to the city wall. The structure is not complicated and looks like the stairs of later generations.

The key is where the stairs are built.

If the defenders add troops to the city wall, then the soldiers will go up the stairs to the city, and the reinforcements will reach the first and fastest place, which is where the stairs are connected to the entrance of the stairs.

As for the siege party, apart from other factors such as watch towers, but considering the variable of the location of the stairs, is it easier to defeat the enemy city if it is close to the stairs, or is it easier to defeat the city if it is far away from the stairs as an attack point?

?

Li Mengxi thinks it is the latter.

The most important task of the siege soldiers is to gain a foothold on the city wall. As long as a gap is opened, people will continue to climb the city. More and more people will climb the city, and the city will be breached.

The siege point should be far away from the stairway. In this way, if the defenders want to support, they will have to walk an extra mile, which will result in insufficient support. If the defenders cannot support enough, they will not be able to close the gap immediately, which will be beneficial to the siege.

And if the siege point is placed at the entrance of the stairs, as soon as the siege soldiers step onto the city wall, the defenders' support will rush up along the stairs and fight directly. Even at the entrance of the stairs, the soldiers who are ascending the city have to face the city wall at the same time.

Attacks from both sides and from three directions on the stairs.

This is not the same level of difficulty as climbing the city wall and only facing enemies on both sides.

Therefore, Li Mengxi saw the stairs and thought that when attacking the city, he should try to avoid the stairs if possible.

However, Li Mengxi thought of another problem. It is easier to avoid the stairwell, but the key is, how to see the stairwell behind the wall through the city wall outside the city?

After much deliberation, there are two methods. The first is visual inspection. Look at the place above the enemy city where there will suddenly be more people. That is the location of the stairs.

But without a telescope and good eyesight, this method is very difficult to operate.

Second, use siege equipment-jinglan.

Among the many large-scale siege instruments that have gathered the wisdom of craftsmen, the well lantern is a rare auxiliary instrument.

Well Lan is actually a movable arrow tower, usually much higher than the enemy city.

When our siege team climbs the siege ladder, the archers on the well can attack from a high position to suppress the enemies at the top of the city. Similarly, because the well has a good perspective, it can also play a role in observing the enemy's situation.

After figuring out the key points, Li Mengxi stopped at the stairs for a moment, then continued walking down.

Li Mengxi probably knew what the well looked like, but he didn't know any details about how to build it. The construction of large siege equipment still had to be done by professionals from the carpenter camp.

Thinking about something in his mind, Li Mengxi unknowingly walked back to the watchtower, just in time to complete a circle.

At this time, the small watchtower was full of people. The soldiers were standing against the city wall. Liu Xuande was talking to the soldiers. When he saw Li Mengxi coming, Liu Xuande's eyes suddenly lit up.

"Xi'er, you're finally back!" Liu Bei trotted to welcome him out of the enemy tower.

As he said this, Li Mengxi didn't leave for a while, leaving Liu Bei to say that he hadn't seen him for a long time.

"Xi'er, I have trouble that I need to trouble you with." Liu Bei came up and said trouble.

This chapter is not over yet, please click on the next page to continue reading! "What's the matter?" Li Mengxi asked.

"The day before yesterday's attack on the city, the siege spine was broken. Now there is no siege spine. How to practice?" Liu Bei spread his hands and said helplessly.

"Also, as for the siege ladders, nine ladders were broken during the siege that day, and we have to find someone to repair them. Now that you are free, I will take care of this matter. How about it?"

"Okay." Li Mengxi responded immediately.

Li Mengxi hurried down to the city and went straight back to find the carpenter.

When I returned to the camp, I found that because there was no fighting, the village warriors were crowded together and I didn’t know what they were talking about.

Li Mengxi came closer and coughed deliberately.

When he coughed, the village heroes did hear it. Some of them looked back at Li Mengxi and saw that Li Mengxi was still saying hello to him. Then he turned away and went back to the crowd.

Hey, let me go, you are really awesome. Your military advisor is here and you are being rude.

What on earth were they playing? They were having so much fun. Li Mengxi came up to take a look.

I saw twenty or thirty people gathered in a circle, with criss-crossing squares drawn on the ground. Was it playing chess? Probably not.

It is a game similar to pot throwing, where you see who throws a small stone into a specific small square, and you win a prize or lose something.

What can these poor devils have to gamble with? It's just a battle against the city and Liu Xuande will reward them with meat and wine.

This group of bastards started gambling as soon as they had something in their hands, a ounce of wine and a ounce of meat.

If you have time for gambling, wouldn't it be good to learn a few more words?

After Li Mengxi understood it, he didn't know whether to curse them or admire them for finding joy in hardship.

"Commander, come and play?" The banker threw the pebbles in his hand to Li Mengxi and asked him to come and play.

Hehe, forget about gambling, you still dare to invite me to have a gambling party.

Li Mengxi chuckled.

Then after looking around, he was smiling one moment, but his face became serious the next second.
Chapter completed!