The final plan of action was agreed to by the Crystal City Command that afternoon, and then the operation entered an intense preparatory stage, and the target hill was named "303 Heights".

Elizabeth's sudden interest in the mountain alarmed Elizabeth, and she ordered to find out as much as possible about the fishmen's purpose, and if they failed to do so, they should take the mountain, and in the last case, the enemy should abandon the occupation of the mountain.

The first phase of the operation was the site selection of the forward camp and the design of the roadway.

The plan reached at the meeting that day was only a preliminary reference plan, and the specific implementation plan still needs to be further studied and designed by the military and experts from the mining engineering design institute in Crystal City.

As soon as the military determined the location of the advance camp, they forced the experts of the design institute to give a design plan as soon as possible.

It was the first time for the dwarves who came here to work to see such a strong father of Party A, but for the sake of the overtime pay given by the other party, they also recognized it.

The starting point of the roadway is finally selected at the west foot of another low hill on the west side of 303 Heights, which is much lower than the foot of 303 Heights, just enough to dig the roadway directly from the ground to the bottom of the high ground, and then circle up to excavate. At the same time, the hill above can block the view of the enemy on the 303 heights.

Charles was in tears when he got the final construction plan, because the total length of the tunnel reached nearly six kilometers, and the length and width of the tunnel were about three meters, taking into account factors such as the slope.

"I think you're overestimating my abilities. Charles said to Aretha, who was handing over the task to him, "I'm afraid I won't be able to complete such a big project, it's not a small fight." ”

"There's no hurry. Sitting behind his desk, Arethosa was drinking tea on the ground, and said unhurriedly, "We don't have much time requirements, you can take your time, a month is not enough, two months." During this time, we will harass the enemy to slow them down. ”

Charles frowned, feeling that Arethosa had given him a strange feeling.

Arethosa continued: "The plan for this project was decided by us after referring to similar projects. ”

"What project?" asked Charles, confused.

"The Pendragon Irrigation Project around Abyss City. Arethosa explained, "A great feat by the previous user of your sword. ”

Charles opened his mouth, but didn't know what to say.

It was only later that he learned about the irrigation system outside the Abyss City with the "Pendragon Canal" as the main body from the dream platform of the Rurik Kingdom.

It was an integrated plantation fishery system that diverted water from Lake Neva north of Abyss City to a large area of land east and south of Abyssal City via the Pendragon Canal, and then back to the Ladoga River to the south. On both sides of the "Pendragon Canal", there are a large number of branch canals and fish ponds for water storage and fish farming. After this irrigation system was built, a large area of barren grassland in the eastern part of Abyss City was transformed into "rice bags", "vegetable baskets", and "fish pots", and it was also effective in hindering the movement of human cavalry from those two directions.

Now that Aratosa is using this project as a reference, Charles really can't find fault with it, after all, Artoria and the prisoners of the prisoner of war camp completed the main body of the project in one winter, without delaying the spring plowing the following year.

Then Arethosa handed Charles a roll of parchment, "This is the latest information I got not long ago, you are qualified to read it." ”

Charles took the parchment scroll, and when he opened it, he was stunned by the news inside, and at the same time understood why the Crystal City side had invested so much effort to dig such a tunnel.

"Are they going to build a castle there?" Charles said incredulously, "it's a big job." ”

Charles's family didn't have a castle, but he used to go to the castle of his neighbor Herman Rick.

As a military nobleman, the castle of the Marquis of Hermanlik was prepared purely for war.

Estimating the amount of work based on the castle of the Herman Ricks, Charles felt that building a castle on that hill would not be built in a year or two.

According to Charles, he will not stop the fish-people from building a castle there, he will only have the Air Force throw a bunch of Molotov cocktails to celebrate when the castle is topped out. In this way, the fish-man's previous investment is almost in vain.

Arethosa nodded, "There's information in the fish-man files you seized that day. ”

"Yesterday we caught the captives in several different places, and they all answered the same thing. ”

Charles's brows furrowed again after hearing this, if this is the case, it means that the fish-man side is going to establish a military and administrative center on the 303 heights.

Correspondingly, whether it is to build a security barrier or to obtain profits, the Crystal City area, a place rich in magic crystals, will be the core area that the fishmen must occupy next.

At the same time, the Wutong City area with a large area of farmland to the east of Crystal City, the Debao area with a large number of livestock farming to the west, and the Dragon City area with a large number of dragon pastures to the north must be the second phase of the fish-man's target.

After Charles stated his analysis, Arethosa sighed.

"You are excellent. Arethosa said in a deep voice, "But it's not good to show the edge......"

Her words became quieter and quieter, and Charles couldn't hear the last words clearly.

"You go back and rest first. Arethosa waved Charles away, "It will take two days to prepare the supplies, you can rest first." ”

Charles left the municipal building and headed for a hotel a block away.

With the beginning of the war, there were more workers coming and going to Crystal City, so the Crystal City authorities chartered a few hotels for the staff of all parties who came on business trips to stay.

And Charles's inn is an industry that belongs to the Temple of Smithing.

Because of the many mines, there are many elves here in Crystal City who believe in the god of forging, and there are also many dwarves who come to work here.

The "Iron Pickaxe Hotel", where Charles lived, had four floors, with the upper three floors for guest rooms and the lower one floor for bars.

When night falls, many miners who have returned to the city for vacation can be seen sitting around the wine table drinking and chatting.

When Charles lifted the curtain of the door with the golden hammer painted on it and walked into the bar, the air was already filled with the smell of alcohol, tobacco and sweat, and the table was full of elves and dwarves.

He pursed his lips, the smell reminding him of the workers' canteen at the construction site in his previous life.

"Here's His Highness's package!"

As soon as Charles sat down at an empty table, the elf aunt waitress yelled at the bar.

Soon, a set meal consisting of large chunks of stew, rice, and juice was served to Charles.

Charles eats here these days, and the owner of the bar quickly prepares dinner for him tonight.

His meals were basically the same as those of the other customers, except that the glass of wine was replaced by juice.

Because of the popularity of Charles's book series on the construction industry last year, he became quite popular among the followers of the God of Forge, and the guests present had heard of his name and regarded him as their own.

At this moment, a already drunk guest raised his glass and shouted, "Cheers to our Highness!"

The guests at the bar raised their glasses and toasted Charles at the same time.

Charles held up his glass of juice in return.

The atmosphere in the bar suddenly became enthusiastic, and an elf played the six-stringed piano in his hand.

The miners and drinkers sang their own songs to the sound of the piano:

The splendid rivers and mountains are picturesque

Workers add bricks and tiles

How honorable it is for me to be a miner

Walk the world with an iron pickaxe in hand

Overhead grassland goose feather snow

Facing the sand sea and windy sand

The coast of the East China Sea welcomes the rising sun

Send the sunset in the forest sea

The sky is not afraid, and the earth is not afraid

Wind, snow, thunder and lightning let it go

I mine stone for the world

Where are the veins

Wherever is my home

......