Bai Yuqi personally rushed to the cave at the exit of the "Tongyoudi River" to investigate.

Looking at the decayed logs piled up all over the cave, I couldn't help but marvel, how many trees did these South Vietnamese refugees cut down in order to escape?

Unfortunately, many of these logs that have been soaked in underground rivers for a long time have withered and rotted and can no longer be recycled.

In order to clear the obstacles, Bai Yuqi simply put them all away and threw them into the Fei Leng Jade World in the Jade Dream Realm to add some nutrients to the small wooden balls.

And with Bai Yuqi, the great god, personally in charge, the progress of cleaning up the cave was extremely fast.

Coupled with the input of a large number of Tiangongmen engineering teams, the original rocky and rugged cave was quickly cleaned up and paved with ground.

According to the description of the South Vietnamese refugees, this "Tongyoudi River" under the "Yao Yao Mountain" leads directly to the South Vietnamese Raft.

After all, the topless "Evil Yao Mountain" is difficult to climb, and if you want to reach the various baskets separated by the ancestral vein holy mountain, you can only make a detour by sea.

If a tunnel of underground water canals leading to the South Vietnamese raft can be opened in the mountains, it can be a shortcut between the two banks.

Bai Yuqi did not rush into the "Tongyoudi River", but threw a large number of spore detectors into it first.

You must know that even in the afterlife of his remaining memories, entering underground caverns and underwater caverns is the most fatal way to explore, let alone in this absolutely primitive wilderness.

The intricate forks and dark rivers aside, the primitive creatures hidden in the underground rivers alone are enough for explorers to drink.

The caster has a variety of spells to prevent getting lost.

But since he has the convenient and easy-to-use investigation system of Tianyan Network in his hands, Bai Yuqi naturally doesn't need to be so troublesome.

Moreover, Bai Yuqi's purpose of entering the "Tongyoudi River" was mainly to find those South Vietnamese refugees who were lost underground.

The ghost knows how many people have ventured into the underground, so you can't expect the few disciples under the Wuji Sect who have mastered the foreknowledge spell to find them one by one, right?

As the scale of the Wuji Gate became larger and larger, the territory and population of the Western Cloud Empire had increased exponentially, and countless mineral deposits and projects were waiting to be developed and constructed.

Most of the Wuji disciples who have already mastered a skill have been appointed as the person in charge, and each of them is responsible for leading the industry, and there are not many who can follow Bai Yuqi to serve at any time.

In the absence of a disciple to do his work, he can't expect Bai Yuqi to do everything himself, so most of the time if he can be replaced by other means, he will naturally be replaced by other means, and the more trouble-free, the better.

Fortunately, Bai Yuqi can rely on more than just manpower.

Behind him is not only the Black Vortex scientific research team and the Constructed Intelligence Legion led by Tai Sui Vortex, but also the White Vortex Arcane team, the Biochemical Spore Legion, and the Regeneration Undead Legion under his own name, and the huge logistics organization composed of is enough to meet any of his needs.

Hundreds of millions of fist-sized spore detectors converged into a torrent and burrowed into the cavern.

The entire cave was mapped in a spiritual way, and a concrete three-dimensional 3D map was depicted in the spiritual network.

To Bai Yuqi and the others' surprise, a large number of forks in the road along the "Tongyoudi River" gradually unfolded like a huge and complex spider web in the spiritual network after the spore detector swept by, and continued to spread to the depths of the mountain and underground.

And this cobweb-like map is not just flat, including but not limited to the fact that behind some small caves that cannot be passed through by the human body, there may be a new world, and the places that are flooded by underground water are full of intricate underwater culverts.

Under the detection of the spore detector, a large number of treasure-like ore veins, geodes, and even completely sealed mountain air cavities were also presented on the map.

It is no wonder that the refugees from the South Vietnamese were able to survive in the "Tongyoudi River".

As long as you are not unlucky enough to be washed into a dead end or completely submerged in a cave under water, don't look at the underground in all directions like a labyrinth, but as long as you follow the water body, you can always follow the water flow out of the surface.

Although the dangerous cave environment is treacherous, there are a large number of underground caves with various mosses, lichens, ferns, fungi, mushrooms and various cave creatures growing along the way, and there are a large number of fish and water beasts living underwater, which can provide a large number of people to live in it.

In a way, in addition to the darkness of the environment, this hidden space inside the mountain is indeed a great refuge.

And the reason why some refugees choose to settle here is naturally because although the underground is dark, it is not completely lightless.

In addition to the various lighting props brought by the refugees, there are also various transparent glowing fish, glowing moss, fluorescent ferns, and some mineral veins and rock masses inlaid with glowing fluorite.

Therefore, it is not completely dark in the "Tongyoudi River", and some areas belong to a dim environment, and you can barely see the surroundings clearly.

Refugees only need to transplant these glowing mosses by hand, keep glowing fish in captivity, and pay attention to collecting fluorite to create a shelter in a habitable cave.

As for survival, water is certainly not scarce, and food sources can be obtained through fishing and hunting water beasts.

Even planting some usable fungi and mushrooms to supplement vitamins, although not as suitable for human survival as the surface, it is certainly not a problem to barely survive.

Such a hidden natural shelter made Bai Yuqi a little interested, and after all the spore detectors sent out entered the "Tongyoudi River", he began to mobilize ships to enter the underground water veins to search for those refugees trapped below.

As for whether the floating ships of the Western Cloud Empire can adapt to the environment of underground water veins...... Isn't it a matter of course that a flying ship can dive?

Moreover, because of the complex environment of underground water veins, in order to avoid danger, the shipboard personnel sent by Bai Yuqi were all composed of intelligent equipment.

At the same time, the junior construction workers equipped with underwater thrusters were sent into the underground water veins in formation.

Begin to repair the irregular and narrow underground channels in the caves, and strive to open a main channel to the South Vietnamese raft.

After the spore detector has explored the entire underground vein, Bai Yuqi plans to build this place into a hidden dungeon.

However, from the map area that has been presented in a short period of time, Bai Yuqi estimates that this underground building should be called the "Underground Kingdom" by then.