The Difficulty of Crossing Mountains Lies in Reaching the Sky!

The Ten Thousand Mile Mountains was merely a unit of measurement.

Its peaks and ridges stretched endlessly from side to side for far more than ten thousand miles, while the overlapping ranges from front to back also extended far beyond ten thousand miles.

Even relying on human labor, one could spend an entire lifetime and still fail to measure how many peaks these mountains contained.

Not to mention that after winter, their area would expand by another hundred percent.

They headed southeast from the lowlands.

After traveling four hundred kilometers, they would roughly reach the entrance to the mountains—a peak standing about two thousand meters high.

On the map, this peak was marked as Shi Mountain.

It meant that when entering the mountains from the lowlands, it was the first mountain they would encounter, and the closest one at that! Without the terrifying infrastructure-building capabilities of modern civilization, building a mountain road that wound around the slopes was out of the question.

There were not many methods humans could use to cross one mountain after another.

The first was to openly build plank roads.

They could send a squad of criminals who had committed serious crimes—the Suicide Squad—carrying expansion nails, wooden planks, and other supplies to search for a relatively gentle route. They would hammer the planks into the mountain as they went, creating a road forward.

This method had not been used much in ancient times.

Most of the time, it was only carried out after a mountain had been brought under a faction's control, to facilitate the deployment of troops.

For example, Prime Minister Zhuge had made six expeditions against Qi Mountain using precisely this method.

The second was to cross mountains and ridges.

The key to this method lay in the word "cross." To pass over a