The old year (577 BC) was very peaceful for Lü Wu, as if he was half-asleep and half-awake.

In this year, the construction of the city wall of the old Lujia city was completed, and the work outside the city was not carried out for the time being, and the manpower used to build the city wall was transferred to the city for construction.

According to Lü Wu's plan, the city will have a "ten" intersection of avenues, directly connecting the east, west, south and north of the four city gates.

Since it is not in any traffic artery, it naturally cannot become a trading city.

There is only a small market in the east of the city, the west city is used to house war horses, cattle and sheep, the north of the city is planned as a garrison area, and the south of the city is the real residential area.

In line with the factor that idleness is also idleness, in addition to fulfilling the responsibilities of the head of the family, Lu Wu got free time and began to try to design bridges.

The "Yin" land and the "Lu" land are separated by a Fenshui, which directly halves all the fiefs belonging to the old Lu family.

If you want to reach the north bank from the south bank of Fenshui, you either have to cross the bridge on the "Kundu" side, or swim across the river, which is a great restriction for the old Lu family.

As for waiting for the water level to drop, revealing a shallow riverbed?

Lü Wu has observed for three years, and the water level of Fenshui, which belongs to the scope of his fiefdom, has not dropped excessively at all.

It's very uncomfortable!

If there is a significant drop in the water level, you can observe the situation of the riverbed and choose where to build the bridge.

Because his father is a contractor, Lu Wu is no stranger to engineering.

What is more embarrassing is that when he grows up, the construction of the Great Celestial Empire has long been free of stone, and the material has become reinforced concrete, which is the same as engineering, but the knowledge used is two different things.

This thing is making cement?

If Lu Wu is willing to put a little effort into it, he will definitely be able to make it if he fails a few times.

There is limestone in Huotai Mountain, which is ground into powder and added with clay and iron ore powder, isn't it a high-quality cement?

Perhaps many people think that the research on cement can be used to build bridges, paving roads and building houses?

Yes, it will definitely work.

It's just that the more elaborate the project, the more reasonable the need for collocation, such as "muscles and bones" is indispensable.

The use of cement alone to build a magnificent building has never been such an exaggeration.

In addition, cement is used in buildings as a starting floor, and metal frames are required to rise from the ground.

Just the lack of metal pillars in the use of cement does not have any load-bearing effect at all.

If you want to use cement alone to grout the ceiling, those net-like "bones" will inevitably crack and collapse.

When it comes to paving, the principle is actually the same.

Those who have seen paving the road will inevitably wonder why a metal grid is woven on the ground when it is good to build a frame with wooden planks and pour down the cement and wait for it to solidify.

What is this metal grid for?

To put it bluntly, it plays a fastening role.

Therefore, in any project, every step has its meaning.

The main reason for this is that Lu Wu has already planned to start making cement and use it to pave roads.

If you say it this way, the previous narrative is used to slap you in the face?

Not!

The reason why modern paving requires steel to build a network is mainly because the compressive strength of cement concrete is very high, but its tensile strength is very low.

Therefore, modern highways, in order to withstand the wanton capture of high-speed and heavy-weight rubber wheels, must use steel bars to withstand the tensile force from all directions, limit the lateral expansion deformation of concrete, and thus enhance the ability of concrete to withstand vertical pressure.

It's not a modern car at the moment, and the weight of the current vehicle is much lighter.

In this way, the planned section of the road is dug down about 30 centimeters, the wooden plank frame is built on both sides of the road, the layer under the surface is covered with a layer of gravel and sand, and then covered with a layer of concrete to make the surface smooth, and after waiting for drying, the road is completed.

Lu Wuhui is now in the city, and if there is a condition, it will be extended to the place where the fief is needed.

And while he was making his own plans, the new year arrived.

This so-called New Year, almost the end of October, a wizard came to tell me that it was not coming in January.

For the New Year in October, the previous status was not enough, and the wizard ignored the existence of the old Lu family.

When Lu Wu became the next doctor, the wizard came to inform him that October was the New Year, and he had already gone through it three times, and he still didn't feel good.

But what else could he do?

If you don't have the qualifications to make rules, you must be following the local customs.

In the winter season, most of the construction stopped, except for the aristocracy, who would occasionally engage in eating, drinking and merrymaking in the snowy weather, and the rest of the class was shivering, looking forward to the arrival of the spring season of the new year.

Last year was the most uneventful year for Lü Wu, there was no conscription order from Xintian, and there was no need to travel long distances to where to gather and then go to war with a vassal state.

He only needs to fulfill the responsibility of the frontier nobles, that is, to sweep away the alien races in the northern frontier.

Song Bin took the troops out of the country and went to northern Xinjiang...... The main thing is to go to the big river area, and after a big walk, I found two medium tribes, so as not to march in vain, and I have some gains.

The two teams sent out by Lu Wu before were still in a state of no news when it came to the spring season of the new year.

Instead, Gallo sent back his men to tell them that they had arrived in an endless plain, and that they needed to find a place to settle first, and then find a local tribe to contact.

Lu Wu guessed that they wouldn't have it easy.

After all, there is also competition among nomads.

Suddenly, a new strange tribe appeared, and the surrounding tribes found it weak and definitely wanted to attack and annex it.

If Gallo finds a tribe weaker than himself, his first thought will be to attack, plunder or annex.

Time passed in a calm and calm.

Lu Wu, who had been busy in the early years and had more leisure time, was actually a little uncomfortable with the year when he didn't receive a call-up.

To put it bluntly, you are used to living in a noisy place, and when you arrive in a quiet and peaceful corner, you may feel very comfortable at first, but after a long time, you will feel restless.

After the spring ploughing, the restless Lu Wu planned to personally lead his troops to the grassland this year, but when he was making preparations, he received a conscription order from Xintian.

The person who issued the conscription order was Yin Zhi, who ordered Lü Wu to assemble a complete "division" and bring the troops to Xintian for assembly within a month.

Lu Wu had been paying attention to the movements on Xintian's side, and he hadn't heard in advance who the Jin State was fighting against, so he was puzzled as to why he suddenly came to the conscription order.

Because the conscription order was sent by Xun Zhi.

Lu Wu couldn't help but have some hesitation in his heart, thinking about whether to wait a little longer and see who else would send a conscription order.

While waiting, he sent a fast horse to Xintian, mainly to find out why a conscription order had been issued.

Just one day after the ride, Liang Xing, who was stationed in Xintian, sent someone back.

It turned out that this time the call-up was not about starting a war with anyone.

The Jin State has always been interested in wooing the Wu State, and even wants to cultivate it, hoping that the Wu State can create more trouble for the Chu State.

A long time ago, that is, during the reign of King Jing of Jin, the Jin State repeatedly invited the State of Wu to participate in the Huimeng.

Wu Guo agreed every time, but he didn't come.

"This meeting was held in Zhongli." Lü Wu summoned his retainers and asked, "Where is Zhongli?" ”

It's just an alliance, not a battle.

Lu Wu will definitely respond to Hao Zhi's call, and it can be regarded as returning the favor from last time.

Several retainers looked at each other, they didn't know where Zhongli was.

Seeing that no one answered, Yu Xian saluted and said, "Lord, Zhongli is in the south of the Song Kingdom. ”

Yes?

Lu Wu's heart instantly felt a little cold.

The last time they fought the "Battle of Ma Tunnel", they traveled from Qin to Song, and they spent more than four months on the road alone.

Zhongli is in the south of the Song Kingdom, isn't he going further?

When Lu Wu heard Yu Xian mention Huaishui, he could roughly tell where it was.

If he remembers correctly, the ancient ...... Ahem, is the "now" Huaishui, should it be in modern Anhui or Jiangsu?

This Nima!

According to the geographical location, the "yin" land is located in the southwest of modern Shanxi.

Zhongli is in Anhui or Jiangsu.

Lu Wu filtered it in his mind, predicting that the distance between each other would be at least more than a thousand kilometers, and he couldn't calculate how much it was exceeded.

And that's still a modern drive!

Modern transportation is so developed.

There are no lines of communication at all.

The retainers were also stunned.

They were far more accustomed to the current state of the journey than Lu Wu.

Yu Xian said: "Lord, you must plan for the affairs of the next two years, and then pay the tax. ”

Lu Wu, who was still guessing how long he would have to walk, immediately looked a little unsightly when he heard it.

Song Bin, who originally wanted to follow him to learn more, learned that it would take so long, so he sighed secretly and thought, "I can't go!" ”

A family always needs someone to look after the house.

Lü Wu's three sons were all young and had no powerful relatives.

If he wants to participate in the alliance, Song Bin needs to take on the responsibility of taking care of the house.

What needs to be built in the fiefdom, and the plan for the plan, Lu Wu has already prepared it, but he is not in a hurry to take it out.

Before leading his troops to set off, Lu Wu took out the schedule that had been prepared earlier.

Yu Xian, who took the plan, saluted and said, "When the Lord returns, show the resignation with the Lord." ”

Lu Wu was beaten by a surprise attack, and his brows couldn't help frowning.

He quickly loosened his frown and asked, "I wonder what I should be rewarded?" ”

I can't help it!

Yu Xian had already agreed before becoming Lu Wu's retainer that one day he would return to his family.

And he has been working for Lu Wu for five years.

He should have made a request this year, but he didn't expect that Lu Wu would go to the far south this time.

Being able to inform Lu Wu before he left is a very courtesy.

Therefore, it can only be a good gathering and dispersal, and it is better to leave a good story.

The average life expectancy of people nowadays is less than thirty years old, and the aristocracy will definitely live longer.

It's just that there really aren't many five years in life.

Yu Xian, who is already in his thirties, has learned a lot from Lao Lu's family, and it is time to return home and apply what he has learned.

Therefore, he very respectfully asked, "Please allow me to use the Yin irrigation method in my fiefdom and allow me to make a waterwheel." ”

Lu Wu didn't even have time to speak.

Ge Cun stood up very impolitely and said, "Irrigation is okay, but the waterwheel is not allowed!" ”

Song Bin then followed suit, expressing the same opinion.

The rest of the retainers, one of whom was counted as one, also refused to copy the waterwheel of Yu Xian.

Lu Wu thought to himself: "There are many water systems in the south, and crops are also dependent on paddy fields, so it is true that waterwheels should not be allowed, otherwise the Chu State will learn it, and the Central Plains countries will have a lot of fun!" ”