The difficulty of breaking through the wind realm is one level higher than the attack in the geometric stone formation area. The first step was to enter the Fengjie River to collect timber for the construction of the bridge, and there were many casualties. The next task was even more arduous, and the only thing he could do for his brothers who died in the river belt and could never come back was to lead the officers and soldiers of the Hongyan Battalion to pay homage to the river and then continue to move forward.

The process of collecting materials for building the bridge was completed, and the red, white and black timbers were neatly stacked in front of the formation, waiting for the purple light order from the commander-in-chief. As long as he left the river belt, Xi Mutong would have no difficulty in commanding, and the Hongyan camp waited for a while, and the purple flag light arrived, signaling the start of the bridge building work.

However, if someone has the materials in hand, they can't start construction immediately, so they have to find the bridge foundation first, which is the coordinates of the rib road in the ten rib areas, and if there is a mistake, the construction of the wind bridge will lose its meaning.

To position the bridge base, it is necessary to strictly use numbers as a reference. The spacing between each group of bridges and the starting point is 100 zhang, 111 zhang, 123 zhang, 136 zhang, and 140 zhang, according to the progression of one, two, three, and four, and the spacing between the last group of bridges is 30 zhang, even if the positioning is successful.

First of all, the 1st and 10th Commanders dispatched to measure the exact 100 zhang on the far left and right sides of the Wind Boundary River respectively, and then drew a red circle with the shadow of the sword, which was considered to complete the first set of positioning.

The second and ninth parts, on the basis of the previous team, extend eleven zhang forward, and then use the red circle of the sword shadow to position. The third and eighth parts, extending twelve zhang, do the same movement. It continued until the fifth and sixth divisions, and if the previous team measured and positioned accurately, the distance between the two divisions should be thirty feet. If the measured data is incorrect, it means that the positioning of the ten bridge foundations will all be reworked.

In an instant, the wind realm was from the inside to the outside, and the atmosphere suddenly condensed, and everyone held their breath and focused their eyes on the ranged soldiers.

The two sappers were carrying heavy loads, and each walked from the fifth and sixth parts to the middle of the riverbank, and when they met, one of them reported the result, and the accurate one was thirty zhang.

"One-time success!" Hongyan Sword pointed to the sky and announced loudly, and there was a sudden jubilation inside and outside the Wind Realm. Finding the bridge foundation, Hongyan Camp has taken a decisive step.

Next up is the bridging. The bridge spans the Wind Boundary River, and each time it is built, it brings fluctuations to the air flow. In order to prevent this fluctuation from being detected by Nangong Xiang, they could no longer act at the same time like the Wind Boundary River, but started work in pairs on the left and right sides, in the order determined by the bridge foundation, to maintain the balance of the air flow on the river surface.

In the wood, black is the pier inserted under the water, white is the bridge deck tiled on the water, and red is the bridge railing, and none of the colors can be mismatched, otherwise the whole bridge will collapse after the construction is completed. The timber was limited, and if a second one could not be built, the operation would have failed.

The results of the battle of the Mojing Battalion in the geometric stone formation area, Xi Mutong had carefully inspected, tens of thousands of black and white boulders were laid out by the joint efforts of 10,000 soldiers, and none of them were spliced wrongly, so she had enough trust in the divine soldiers of the Vast Eagle Beacon Fire Battalion, and believed that the sappers of the Hongyan Battalion would also be able to live up to their mission and build the Wind Boundary Bridge victoriously.

Hongyan is a little more anxious than Mojing, and he can't bear to be taken by others to take the hourglass, so he must hold it in his hand to keep track of the time at any time. At this time, look at the quicksand pool, turn another cycle and the time will come, and busily signal the first and tenth captains to start work.

Even if he trusted, Xi Mutong did not let down his vigilance at all. The sappers have infinite divine power, and they are all doing the work of building bridges and paving roads, and they have a clear goal, and their actions are extremely fast, and with only three strokes and five divisions by two, the first and tenth wind bridges appear in front of people's eyes like miracles falling from the sky.