Yue Guanchao took out the bamboo tube explosives, went down to the surface of the rock layer that had been dug, and began to arrange the explosives near a certain crack.

When everyone hid in the distance, they only needed to ignite the primer, and the rock formation roared, bursting countless rubble, and when the gray smoke cleared, they looked at the surface of the rock layer again, only to see that the narrow gaps had been expanded by explosives, and a huge crack appeared that could accommodate people to pass through.

"It's successful, although this cave is not big, it is still possible to accommodate two or three people to enter the underground at the same time, let's go down and have a look first, at least we must ensure that it is safe under these holes. When we came up, we started driving the piles and pulling the ropes."

After Yue Guanchao finished speaking, he and Xu Xiake went down to the side of the blown hole, which was about one meter wide, along

The long notch formed an eye-shaped hole, and the surface was bumpy with explosives, and the smoke of gunpowder was smeared.

He picked up the flashlight and shone it near the entrance of the cave, the originally dark underground river space began to be illuminated by the flashlight, judging from the length of the light pillar where the flashlight fell, it was about nearly thirty or fifty meters high from the hole to the bottom of the underground river, as for the distance, there was no way to predict.

He could see that the river channel was running back and forth along the cracks in some rock formations, and the arc of the river channel they saw was probably the outline and direction of these underground rivers.

Finally, he took out a stick, lit it, and threw it into the hole, and the light of the fire made an arc, falling directly to the ground, and when it burned out, the stars disappeared into the darkness.

Due to the limited vision outside the cave, he could not see the more detailed situation, Yue Guanchao went to the shore, and could only tell everyone the general situation he saw.

After listening to this, Song Siyuan nodded to everyone on the shore and said: "I thought this was just some shallow underground cracks, but I didn't expect us to find the underground river directly, the space you just explored should be the underground river channel in the drought season, now it is close to July and August, the flood season has passed, if it is spring and summer, there should be river water flowing here, now the flood season is over, the underground river has probably dried up completely, or only a trickle remains, this situation is just conducive to our downward exploration."

Not much to say, according to Song Siyuan's estimate, they must at least go down to the bottom of the river to be completely safe, which means that from the space above the wellhead, they must prepare at least fifty meters of ropes, and everyone has prepared their own things, built a triangular wooden pile frame along the sand pit, and erected a reel wheel on the top of the shelf, and the two ropes are all tied to the shelf.

When everything was ready, Yue Guanchao and the others each brought the things they needed for the underground expedition and began to assign future tasks.

First of all, he and Song Siyuan, Xu Xiake, and Yue Erpao are definitely going to go, and Keli, Nayi, and Wang Yuanqi are also going to follow, as for the Gu Baiyue brothers and sisters, they themselves are looking for the Sand Sea King City, so they have to follow them to adventure, there is no reason to wait until this step but retreat, of course, they also have to enter the underground river.

The real unnecessary to get involved in danger is probably the old herdsman Queenie, they didn't have the idea of bringing Queenie to the desert, they just wanted to rent the old herdsman's camel, and they didn't want him to come with them at all.

Right now, they were about to enter the underground river, and they didn't know what danger they would encounter, and they had no reason to let Queenie take any more risks, so they simply asked him to wait with him and a few of his men on the shore, on the one hand, to meet them, and on the other hand, there was no need to let them enter the dangerous place again.

Regarding Yue Guanchao's plan, Queenie obviously had his own thoughts, he waved his hand and said, "Old man? It's true that I can't keep up with you in my old age, but one thing, these guys of mine are all strong and good hands, and it's useless for you to leave them on the shore, so you might as well leave only two of them, and you can take all the remaining four or five people down, and you can also help you to help, what do you think?"

Yue Guanchao knew that Quinny had good intentions, and they no longer refused, and only picked four or five strong guys, intending to take them into the underground river together.

After the distribution, Yue Guanchao led everyone down to the bottom of the sand pit, and then tied the rope around his waist and slowly slid downward, and after sliding thirty or fifty meters, he

He could already see the bottom of the dark river, and he had already settled down as soon as his footsteps touched the damp lower river.

He made up his mind, and used the torch to illuminate the surrounding space, in addition to the grotto, it was the silt and moss in the underground river, and made sure that there were no beasts and monsters lurking in the dark around, so he flashed his flashlight to the top, signaling that everyone could come down, and with his demonstration in advance, the rest of the people also fell into the underground river with the rope and stood around Yue Guanchao.

Tick tock, tick tock!

The underground river where they fell was only a layer of slowly flowing groundwater on the soles of their shoes, no matter how deep it was, it was only up to the surface of their feet, and it was full of moss and aquatic plants in the underground river, which almost never appeared in the desert.

Song Siyuan turned on the flashlight and looked up, where they were, probably the bend of the underground river, forward and backward, are constantly bending the river stone wall, looking up you can see the top of the grotto forty or fifty meters high, all the strange rocks are craggy, rugged, and there are traces of streamlines eroded by flowing water on the surface.

This mottled water mark spreads from the soles of the feet to the top of the grotto, and the surface of the rock formation is polished very smooth, covered with strange lines, and water droplets fall from the top of the head from time to time, probably from the cracks of some rock formations.

Song Siyuan stared at the lines of the water and said, "It seems that my guess is right, now that the flood season is indeed over, this pattern spreads from the bottom of our feet to the top of the grotto, it can be seen that the groundwater level is higher than the current water level when the water rises, and it has reached the top of the river."

"Where are we going to find the Sand Sea King? It seems to be possible to walk back and forth, and if you go to the wrong place, you will go further and further, and you must not forget that there may be some blood-sucking blankets or something in this underground river." Xu Xiake observed the surroundings and said.

Song Siyuan didn't seem to be very worried about this, explaining: "People go to high places, water flows to low places, if my guess is correct, the Sand Sea King City should be in a cave that has collapsed underground, under the premise that the water flows to a low place, as long as we find the direction of the water flowing forward, we can probably go to the lowest place, and those places must be sinkholes."

After speaking, Song Siyuan took out the prepared fallen leaves and sprinkled them directly into the water, the dead leaves were idling and rippling in the water, and after a while, she began to find the direction of the water flow, and was surrounded by the water flow towards a low place, she Nunu said: "We follow these fallen leaves to flow forward, we can find the lowest part of the water flow, if there is really a sinkhole ahead, then we will definitely be able to find the Sand Sea King City."

Without further ado, everyone turned on their flashlights and began to walk forward in the direction of the flow of fallen leaves.

About half an hour later, the surrounding river environment has changed, they can also feel that the underground river seems to be getting wider and wider, just now the widest part of the place where they fell is only ten meters, at this moment, the width of the two sides has become forty or fifty meters, barely able to be illuminated by the flashlight to the stone wall, the depth of the water has never exceeded the surface of the foot, to the position of the ankle, even the moisture has increased a lot.

"What do you think that's that?"

When Yue Guanchao walked around, he inadvertently swept to the waist of the underground river, and what appeared made his pupils widen, signaling everyone to look at the position of the waist of the grotto.

In the light of the flashlight, they could already see even more eerie filamentous lines appearing on the stone wall.

This pattern is completely different from the erosion pattern formed by the water flow, which can be seen to resemble tree rings, most of which are composed of cascading irregular lines, extending everywhere without direction, some of the lines are crystal clear and shining white, and some of the lines are green and mottled to feel the green and brittle like grass and trees, and the texture of jade appears.

There are also some lines that seem to be agate of different colors, red, yellow, white, gray, blue, and cyan are distributed along the main lines, which look transparent and moist, similar to a translucent texture, outlining the lines like colorful silk flying, and under the light of the light, the reflection of the streamer is very strange.

Song Siyuan was also attracted by the texture of this stone, approached these veins with a flashlight, and used the flashlight light to enter these clear lines, and could see the light flowing in the lines, as if magma was poured into the stone cracks, and the bright light continued to burst out in the gaps, and there was a feeling of full streamer, illuminating the surroundings, and there was no feeling of darkness.

"I think this should be the Jade Vein, me

When we discussed the texture of the rock strata of Hongbai Mountain, we have already said that the stone material of Hongbai Mountain is sandstone, sedimentary rock, limestone, hydrogenic rock, dolomite, and there are many agate stones, opals, bloodstones and jade raw ore in the stones.

"Aren't all jade mines distributed in clumps? How can there be such a line like a silk thread?"

Wang Yuanzhen also saw a lot of jade merchants in Dunhuang, only to see that the jade mines were sold in pieces, or they were made into commercial jade pieces or something, and there were few veins like today.

Song Siyuan observed the patterns of some jade veins again, and casually explained: "What you see are all raw jade ore that has become a commodity, or simply jade components that have been carved very beautifully, and what we see now are ore veins that have not been discovered at all, and do not even exist as commodities."

The so-called jade vein, just like the gold vein, copper vein and other veins, is the vein of some mineral elements naturally existing in the stone, sometimes in the form of silk hairspring, sometimes in the form of metal particles, sometimes both, as long as you can follow these natural veins, you can find a large area of ore.

The ore will eventually be removed from the mine. It is cut into raw ore of various sizes.

"Let's keep going, and maybe we'll see a lot of ore."

They followed the traces of the ore vein, continued to walk forward along the direction of the flow of fallen leaves, and walked for about half an hour, and the gossamer veins finally began to appear in a large area of ore, and some rock formations mixed with jade and agate began to appear in large areas, and the area of jade agate mixed with them continued to increase, shining with the luster of gems in the flashlight.

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