"Captain Erwin, all the giants in the Torrost area have been wiped out, and all the nearby giants have been lured away!"

"Great work! Tell Captain Levi that you can rest for a while."

The head of Erwin, who led the main force of the Survey Corps, the remaining troops of the Southern Garrison Corps, and many of the requisitioned people who had returned to the southern end of the Rossi Wall where the city gate was destroyed, nodded solemnly to the heralds, then turned around and said to Chu Xuan, who was still wearing the uniform of the training corps, in a solemn tone:

"Then I'll leave it to you next, maybe we only have this one chance, and I'll lead the soldiers to buy as much time as possible for you."

"Everyone's sacrifice will not be in vain, and we will definitely succeed."

Under the sun, Chu Xuan pushed down his reflective glasses expressionlessly, and then immediately turned around and announced to the graduates of the training corps, some soldiers of the garrison corps, and the people who came with the army:

"I command:

Each team immediately entered their respective work areas and immediately started construction according to the predetermined plan! ”

"Yes!"

"Team 1 is coming with me......"

"Team 2 will come with me......"

"Team 74 is coming with me......"

"Team 131 is coming with me......"

There were no motivational speeches or enthusiastic slogans, and more than 100 teams, under the leadership of their respective captains, quickly and orderly pushed various tools and materials into the area under the responsibility of their own teams, and began intense civil engineering work.

On the night of the breaching of the Rossi Wall, Regiment Commander Erwin and most of the members of the Survey Corps, including the graduates of the 104th Training Corps, who had been temporarily recruited, listened to Chu Xuan's method of blocking the door and witnessed the success of the "miniature model experiment".

Then Commander Erwin, with great courage and without having time to report to Wang Zhengaxe, forcibly promoted the implementation of this method, and almost coercively coerced the remnants of the garrison retreating towards the Wall of Sheena and the young men of the Toloust district and the villages and towns along the way back to the Toroste district.

And when Chu Xuan collected all the tools necessary to block the door overnight, it was as if he was doing [***], and even the beams of some residents were demolished.

Although Chu Xuan's method of blocking the door did not take long, it could not be completed in an hour or two, so they could only take advantage of the fact that all the giants near the south gate of the broken Rossi Wall had entered the inside of the Rosai Wall and dispersed, and the giants from the other directions of the Rosai Wall had not yet arrived at this gap to finish all the work.

Those giants who only relied on instinct to move blankly on the ground would soon gather from all directions as if someone was directing from behind after there was a gap in the "wall", and if they didn't make a quick decision, Chu Xuan's method of blocking the door would not even have a chance to be implemented at all.

"Hurry, dig quickly, our team's progress is already a little behind!"

"Bring a piece of wood!"

"Don't move there, it's here that should be dug up!"

"You need to use a moving wooden wall to block it here, and pile it up with dirt behind the wheels to make it stronger!"

More than 3,000 people were working nervously almost side by side near the outer gate of the Torrost Quarter, which had been kicked by a giant giant, a long dragon of humans connected to the breached outer gate on one end and a huge rock near the outer gate on the other.

The rock was smashed directly into the residential area by the super-large giant when it kicked through the city gate, and although it was only a small pebble that could be kicked away with a single kick for the super-large giant, the rock was actually taller than a three-story house, and it could completely block the broken city gate.

However, it was not easy to move the rock, which was larger than a three-story house, behind the destroyed outer door, and it was not impossible to pull it hard, but it would take too long, and the number of people who died to delay the giant could be more than a dozen times the number of people responsible for carrying the rock.

Under Chu Xuan's command, each team followed the route he designed, and between this huge rock and the outer gate, the small stone bricks that were originally paved on the street were lifted, and a shallow pit was dug in the center of the road, and then many beams were paved on both sides of the pit that served as wooden rails.

There is also a use for the small stone bricks that have been lifted up and the excavated earth is also used, the small stone bricks are placed under the wooden rails to adjust the height of the wooden rails on both sides, and the excavated earth and the remaining stone bricks are piled on the outside of the wooden rails to prevent the wooden rails from being squeezed out under the weight of the boulders.

This method is simple to say, but if there is no Chu Xuan, precise measurements are required to ensure that the boulder can roll smoothly along the track to the city gate.

The height of the wooden rails on both sides, the inclination of each section of the track before and after, the curvature of the curve, the speed at which the boulder rolls on each section of the track, the habitual name, the friction, ...... Fortunately, the shape of this boulder was relatively regular, otherwise even Chu Xuan would not be able to let it roll smoothly over such a long distance, so he could only slowly move it to the city gate by constantly spreading logs under the boulder.

However, even so, the amount of computation involved was extremely huge, and Chu Xuan's demonstration using the scaled down model could only be used to fool people and make everyone have more confidence in this method.

The stiffness of the wooden rails and wooden baffles is sufficient for the demoblith, but the lack of stiffness of the timber is also a big problem for a boulder taller than a three-story house, and if it is not taken into account, there is a high risk that the boulder will derail or crash through the movable protective wooden wall that was originally used to keep the giant at bay.

It is precisely because of this that Chu Xuan has guided and supervised the whole process of this seemingly not too difficult civil engineering, and he also needs to strictly inspect such small things as the depth and width of the tunnel, and each wooden rail is personally determined by him to determine the location, height and inclination before he can start the reinforcement operation.

The temporary track, which was less than 400 meters long but had been laid by more than 3,000 people at the same time, took three and a half hours to complete, and they spent nearly five hours here from the time they entered the Toloster district.

In the past five hours, there have been no giants to disturb them, whether it is the outer gate or the inner gate, but this is not to say that those giants have already been **, but because there are many soldiers outside this urn city who are buying time for them with their lives!

"The track has been laid, and everyone immediately disperses behind the wooden walls as planned, and is ready to start moving the boulder!"

Chu Xuan, who returned to the side of the boulder, gave the order to the squads to resist the movable protective wooden wall used as a "baffle" along the way, and after everyone was in place, he ordered the "start group" to pry the boulder.

Although the principle of leverage is used, a boulder as large as a three-story house is not something that ordinary levers can pry, even if it is a steel lever, it must be extremely thick, Chu Xuan's method is to put a few relatively small stones behind the boulder to squeeze it, and then drive the wooden wedges into the back of each small stone one by one, indirectly prying the big stones.

As long as all the remaining bricks and tiles around the boulder are cleaned up, the boulder is like sitting on a platform, and the front end of the platform is dug up in the direction of the track, and then pushed it from behind with a pry belt, so that it can be pushed onto the track relatively easily.

"It's moving! It's moving! Attention everyone! ”

With the efforts of everyone, the spherical boulder sitting on the platform shook twice, and then rolled smoothly up the tunnel.

Because the wooden rails on both sides of the tunnel were specially padded higher at the beginning, as long as everyone worked hard, they could still push the boulder forward along the tunnel, and after the boulder rolled a little faster, it mainly relied on the habit to move forward.

"Gurgling ......"

The heavy sound of the boulder rolling seemed to be directly crushing everyone's nerves, and everyone's hearts gradually rose with this sound, and they all held their breath as it slowly approached the wooden wall at the first turn. (To be continued.) )