After making these arrangements, Jiao Bai didn't stay here for long, but summoned two fat-headed dolphins and pulled him along the underground river, swimming upstream, to the location of the huge gold mine upstream.

Walking against the current is always very difficult, and even with two strong swimmers and fat-headed dolphins, it still took Jiao Bai nearly two hours to reach the location of the gold mine. There are no caves to settle in, and the river is very fast, so it is very difficult to stay still. Fortunately, Jiao Bai had the earth escape skill by his side, and directly activated the skill and escaped into the stone next to the underground river.

After going deep for a distance, he found a small hole between the rocks, Wu Zhihang took out a percussion drill from the space he carried and directly expanded the hole into a space for him to stay. After entering it, Jiao Bai held his breath and canceled the earth escape skill on his body. Then immediately from the carry-on space, take out the compressed air tank that had been prepared a long time ago, open the valve on it, and in the snorting sound, Jiao Bai finally spit out a mouthful of turbid air in his chest and breathed heavily.

There is air brought by the river in the underground river, and in the state of earth retreat, it can exchange air with the soil, but in this newly opened space, there is nothing, Jiao Bai can only prepare some compressed air by himself, which is used to supply him and the summoned beast with breath.

From the carry-on space, he took out a barometer and monitored that the air pressure reached about one atmosphere, and Jiao Bai closed the valve on the cylinder. Jiao Bai then proceeded to expand some of the caves, summoning two pangolins and allowing them to activate the "Fossil to Mud" skill to further expand the size of the caves. And the direction of expansion, of course, is the direction of the underground river, after all, only there is enough air to use there.

The pangolins were working hard, while Wu Zhihang was following behind, taking out the cylinder from time to time and putting some air out, always maintaining the air pressure in the cave. At the same time, the clay turned into stone is collected into the carry-on space, and the gold content of these clay is also not low, so it cannot be wasted casually.

The passage to the underground river was soon opened, and the fresh air brought by the underground river soon filled the entire cavern. Jiao Bai put away the air cylinder, casually summoned a dozen pangolins, and ordered them to continue to expand the area of the cave. Jiao Bai took out a handful of zombie crystals from his free hand, and began to use special summoning skills to summon zombies.

The level of these zombie crystals is not high, generally about three or four levels, but the number is very large. Some of these crystals were obtained by Jiao Bai by hunting zombies on the way back to Sheshan from Qiongzhou Island, and some of them were obtained after he swept away the zombies around Sheshan in the recent past.

By the time the zombie crystals were consumed, there were already more than 300 zombies of different shapes standing in the cave. Wu Zhihang spent money from the system store and exchanged a human skin for each of them. After all the distribution was completed and "dressed", the zombies finally took on some human forms. Wu Zhihang stood in front of them and said, "Your future task is to mine gold ore here, and I will give you the tools and machinery you need in a moment, and now you will help the pangolins dig and expand the cave first." ”

After receiving Jiao Bai's order, the zombies quickly dispersed and began to chisel stones. Jiao Bai called out to a zombie named Xie Weizhi before his death, and said to him, "I see that you have skills related to mineral exploration and mining, were you engaged in mining before your death?"

Xie Weizhi nodded and replied, "Sir, I used to be the chief engineer of a large coal mine, and I had some research on the exploration and mining of various ores. ”

Jiao Bai patted Xie Weizhi on the shoulder and said, "Very good, you will be the person in charge of this gold mining site in the future, and these more than 300 people and these pangolins will be under your command." You should be able to tell a little bit about the situation here, this is a large gold mine, located under a desert. Because I don't want this large-scale gold mine to be exposed to the world, the gold ore mining work must be carried out in secret.

Your mission is to rely on this underground river to mine gold ore from here to the surrounding area. I have prepared a set of equipment for the support steel beams, rock drills, ventilators, belt conveyors, water pumps, compressor fans, etc., and I will take them out to you after the cave is expanded to a certain size.

The mined ore is piled up in the pit first, and when it accumulates to a certain amount, I will come down and load the gold ore away. In addition, when you are mining, you must do a good job of supporting and reinforcing the mine, I don't want to have an accident in the future, and I have to dig you out of the stone. ”

Xie Weizhi glanced around the surrounding environment, thought for a while, and said, "Okay sir, I have memorized all of this. It's just that it's too close to the underground river for the mine to go downward, otherwise it's easy to permeate. So the mine can only be dug diagonally upwards, and I wonder how many meters there is from here to the surface, and if we dig and dig and dig directly into the surface."

"You can rest assured that there is at least seventy or eighty meters deep from here to the ground, and you don't have to worry about digging into the ground in a short period of time."

"That's fine, then I'll go to work first."

Jiao Bai waved his hand and let Xie Weizhi leave, while he began to collect all the dirt and rubble cut by zombies and pangolins into his personal space. When he was in China, Jiao Bai had already purchased a set of ore mining and gold smelting equipment. The ore mining equipment will be placed in this underground cavern, and the gold smelting and purification equipment Jiao Bai intends to install it in the space base on the ground.

The Sahara space base already had several smelting plants for the production of metal parts for space aircraft. It is also very easy to disguise the need to build an additional smelting workshop for refining gold, as long as outsiders are not allowed to see the gold produced in the workshop, they will not be found to be greasy.

Half an hour later, the scale of the underground cavern was already very large, and Jiao Bai estimated that he could already fit all the equipment. So he stopped the zombies and pangolins from their work, and told them to get out of their hands. Huge pieces of machinery were released from the carry-on space, and soon filled the entire cavern.

After doing all this, Jiao Bai clapped his hands, attracted the attention of all the zombies and pangolins, and said, "In the future, you will work here." Xie Weizhi will be the captain of your gold mining team, he used to be the chief engineer of the coal mine before his death, and he has a lot of experience in mining. For the sake of everyone's safety, everyone must obey his command and work hard. ”，，，

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