However, this did not prevent him from admiring Zhang Heng more and more deeply, and he became more and more convinced when he called him "Master Rat".

And so, on the next morning, they arrived at their destination - a river bank covered with lush green grass.

This side of the riverbank was flat and vast, while the other side was a gently sloping grassland. A dark hole, a hundred meters wide and fifty meters high, lay on that sloping curve. However, the entrance was now covered by a thin curtain of light.

As for the giant river between the two banks, it is actually ten kilometers wide. The water is turbid and surging, and the flow rate has reached a terrifying level.

Zhang Heng saw with his own eyes that several huge rocks, dozens of feet in size, were shattered into pieces by the turbid yellow river water.

"I'm afraid no living creature can survive in this river."

The rumbling sound of the river rang in his ears, and Zhang Heng woke up and found himself standing on the river bank.

"I'm afraid it took a lot of effort to build this bridge!"

Moving his sight from the river surface, Zhang Heng saw a long wooden bridge.

There are four piers on each side of the wooden bridge, each of which is a large stone pillar 50 meters high and 10 meters thick.

It is hard to imagine how much strength it would take to move these eight giant bridge piers here.

This is not the human era, there are all kinds of engineering equipment.

The piers are impressive, as are the cables and decking.

Each bridge cable is one meter thick and is made of a dark vine that looks extremely tough. The surface is coated with a layer of protective transparent grease that is insect-proof, moisture-proof and crack-proof.

The bridge deck is 20 meters long, 5 meters wide and 2 meters thick. Each piece is made of prehistoric giant wood and is extremely strong and reliable.

"This river is called the Soul-Breaking River. It means that if you fall into it, not only your body but also your soul will be shattered."

"This bridge is called the Heroic Bridge, meaning that only true heroes are worthy of crossing it. The other side of the bridge is the Land of Evolution."

"This Heroic Bridge was built in a short period of time thanks to the joint efforts of powerful forces such as the Shaking Mountain Sect, the Moving Mountain Ape Tribe, the Wind Blade Black Bat Tribe, the Heavenly King Alliance, the Ancient Glacier Mammoth Tribe, the Ancient Saber-toothed Tiger Tribe, the Snake Ancestor Cave, the Ancient Venerable Hall, and the Sky-Splitting Sect."

At some point, Chi Tiangang came to Zhang Heng and explained things to him in detail.