Lunch is relatively simple. Vacuum compress the rice, soak it in boiling water, and simmer it for about ten minutes, which is similar to instant noodles. In addition, the dishes are also vacuum-packed and come with diced green pepper chicken. They can be hot and eaten on the lunch box, which is very convenient. After a brief lunch and a 10-minute rest, Ning Xiaofan ordered everyone to pack up and set off. The grotto where it is located is mostly a pool of water. There is only a place on the shore where there are several huge rocks and a steep slope. The ramp is not long, only about 10 meters. When you go up the ramp, you can see a cave. The cave is narrow at the top and wide at the bottom. The entrance is like a crack in the cave. When people stand in front of the cave, they can feel a cold wind blowing on their face. An eerie feeling. Hou San had already gone in first to explore the way. When Ning Xiaofan received the reply that it was safe, they filed into the cave in their own order. When he first entered, he still felt that the cave was dark and gloomy. However, not far away, Ning Xiaofan found that the cave walls on both sides seemed to be flickering with faint light spots. The fat man also noticed something strange about the cave wall. He walked to the cave wall and touched it with his hand. He brought it close to his eyes and looked at it. He saw that there were light spots in the palm of his hand, which were densely packed, like dots of starlight. The fat man sniffed it with his nose and said with a smile: "It's phosphate rock powder." "You mean, there is phosphate rock here?" Ning Xiaofan asked. "Absolutely" The fat man nodded and said, "The phosphate rock is exposed, so the purity is probably relatively high. You can turn off the power to save some battery usage." Everyone followed the instructions and turned off the flashlights and helmet lights. First, they felt a sudden change in front of their eyes. It was dark. I closed my eyes to adjust. When I opened my eyes again, I saw a green light glowing from both sides of the cave wall and the dome of the cave wall. The entire cave was shrouded in soft light. The light was dim, but it was enough. See things. There was phosphorescent light in the cave, which was not just a beam of light like a flashlight, and it was easy to miss blind spots when it was swinging around. Ning Xiaofan and others felt more at ease and couldn't help but speed up their pace. This cave is not as long as expected, only about four miles. When we exited the cave, our eyes suddenly opened up, and what we saw was another huge space. The area of ??this space is extremely wide, almost the same as the area of ??Base 3. However, Base 3 has been renovated and the terrain is relatively flat. The space here seems chaotic and uneven, with huge jagged rocks scattered among them, including many strange stalactites and thick stalagmites hanging from the dome. The sound of dripping water is also endless. There are faint light sources flickering in some places in this space, probably due to phosphorescence. Two light beams can be vaguely seen flickering and swaying in the center of the space. Needless to say, those two light beams originated from Hou San¡¯s helmet dome light and flashlight. The space was huge, and it was not only unfair but also time-consuming to let Hou San detect it alone. Ning Xiaofan immediately ordered Zhang Chun and Chen Biao to detect separately, while Ning Xiaofan took the rest of the people to find a place to rest. Ning Xiaofan¡¯s qualifications in the development department are very low. It is not an exaggeration to say that he is a newcomer. However, from the time he set out until now, he arranged these chores and issued certain instructions with a firm tone that left no room for doubt. He knew in his heart that as a team leader, he could not hesitate at all or allow different voices to be heard. Fortunately, Fatty, Hou San and others did not show any dissatisfaction with him as the team leader, nor did they make any noise. So far, everyone has obeyed his arrangements. Ning Xiaofan did not arrange for the fat man to go out for detection. From his perspective, firstly, the fat man was fat and his physical strength would not be able to keep up. Secondly, the fat man, Hou San, Zhang Chun and Chen Biao were originally a small group. A gang, and Fatty himself is the leader of this small gang, so he has to take care of his emotions to some extent. As for Lao Wang and Xiao Shanzi, these two carry a heavy load, so they naturally need to seize the time to recover their strength, so there is no need to send them out again. Ning Xiaofan was more considerate, and Fatty seemed to feel his kindness in taking care of him. When the two of them sat down to rest, Fatty took the initiative and said, "Xiaofan, you don't have to take care of me like this." "If I don't take care of you, Can you do that?" Ning Xiaofan said teasingly. "Haha, don't underestimate me, Fatty. When Fatty and I went to the mountains and countryside, what kind of hardships did we not suffer?" "Going to the mountains and countryside?" Ning Xiaofan was startled. "Well, it's not the one you think of going to the mountains and countryside. I mean, in the profession I worked in before, climbing mountains and wading in rivers was a common thing." When the fat man said this, he pondered for a moment and then continued: "Xiao Fan, I know What are you thinking about? Don't worry, Fatty, I'm not the kind of person with a weak heart. Considering our relationship since we were young, what else do you have to worry about? So, you don't have to give me face, it's my responsibility. You can just arrange it for me, it's serious." Ning Xiaofan couldn't help but smile. This fat guy had a naive look on his face, but he knew what he was thinking. "Of course, if it were anyone else, Fatty would never buy it, and that would be you." Fatty added. Ning Xiaofan said with a smile: "That's right. You have been a baby since you were a child, and you rarely convince others. If I don't give you some face, I won't be able to live with myself." "You, you are honest on the surface, but you are delicate in your heart. I know you are thinking too much" The fat man shook his fat head and said: "We are here to make a fortune this time. Fatty, I have no interest in fighting for power and profit with you. Besides, you are more evil than Fatty and I. I want you to It's not easy to suffer any loss. Although you are a newcomer, I am still relieved that you will lead this team. In this way, Fatty, I will give you a sure idea, how to arrange this team leadership. It's all up to you. Fatty will definitely obey. You don't have to think about me specifically. As for some professional matters, if you don't understand them, just come and ask me. If it's my turn, I won't do anything about it. How about that? " Fatty's words were a statement. Ning Xiaofan smiled and said: "Your words are enough. We brothers will cooperate well this time and try not to leave empty-handed. " "Haha, this is the right thing to say. I am. Let me tell you, we can really make a fortune this time" The fat man's little eyes blinked with excitement. "Really? Are you so sure?" Ning Xiaofan was also slightly excited. "Absolutely, let's talk about our Xin'ao first. Xin'ao's investment this time is not small. You have to know that any multinational group of this kind will never do anything that is not sure. It invested such a large amount of money here and found nothing. It is absolutely impossible to have no harvest. I guess that Xin'ao has already tasted the benefits in the early development. Furthermore, let's talk about the landform here. So far, it looks like a karst landform. , there are huge cave wonders, and there are also underground rivers, but when I looked at the water in the first cave, I found that part of the water had a higher temperature, which means there is geothermal heat in this sinkhole. What does geothermal mean? ? It means that this sinkhole should have been a crater a long time ago" "Crater?" "That's right, my judgment is like this. Let me tell you, if this was once a crater, then, rare minerals There will be no shortage of them. For example, diamonds are the most found in places with volcanic craters. Also, after a volcanic eruption, some minerals will be smelted at high temperatures, and all the minerals that can be preserved are precious minerals. Such as rubies, sapphires, etc. Of course, over time, some other associated minerals will also be produced. Take the phosphate rock we discovered earlier. It stands to reason that phosphate rock is generally closer to the surface and is easier to mine. It was formed after the volcanic eruption. Then the phosphate rock should have been formed after the volcanic eruption" Ning Xiaofan smiled bitterly: "I know diamonds and gems, what do you mean by phosphate rock? , I don¡¯t know.¡± ¡°Well, it seems that what I said is more complicated¡± The fat man touched his bare forehead and said: ¡°Let me tell you, if I am correct in judging that this place was once a crater, then The last volcanic eruption here was probably hundreds of millions of years ago, maybe even older. Hey, after hundreds of millions of years of address movement, think about it, how many rare minerals are there? " "I still don't understand? " Ning Xiaofan was really confused at the moment. The fat man was speechless. He stared at him for a long time with his small eyes, and then sighed and said: "It's terrible to be uneducated. Forget it, I won't tell you that it's so complicated. In a word, I'm sure, Fatty. I won't go back empty-handed this time." Ning Xiaofan didn't take it seriously and said with a smile, "Well, I understand what you're saying. That's what we're here for. By the way, let's come in." It's been a few hours. How big is this sinkhole? And I feel like it's going deeper, and I don't know where it ends. Do you think we will go deep into the center of the earth?" "The fat man turned over? Rolling his eyes, he said: "Don't think about the center of the earth. Do you think it's the movie "Journey to the Center of the Earth" where there is a world below? You should have studied geography before, right? Our earth is composed of crust, mantle, and core. "We're probably dead before we reach the mantle." "Oh, high temperature, I really don't know how you learned about geography. The earth's crust is made of rock, and the mantle is made of magma. You know what it is, right?¡± ¡°Of course I know that.¡± ¡°You know you¡¯re still so naive?¡± ¡°Damn it, am I naive?¡± Ning Xiaofan was hurt by him and said unconvinced. Such a big tiankeng? Do you know what is under the tiankeng? Also, you guys don¡¯t listen to the end. Do I mean the core of the earth? , will there be an inner earth world here like in the movie" Seeing that Ning Xiaofan was a little anxious, Fatty smiled: "Don't be impatient with me, the inner earth world in the movie is too fantastic, but , I don¡¯t know how big it is here. I only know one thing, there are no creatures in this deep underground, let alone the dinosaurs and monsters shown in the movie, oh,There must be some stone"