Deep, dark, twisting, and seemingly endless. There is no sun and moon underground, and I don't know how long I walked, but the underground river finally came to an end, and the water was not up to my knees, and the river became a stream.

"Hey, old man, isn't it time to arrive?" Yunfeng shouted. There was no response, and then I remembered that the old man had not spoken for a long time. Looking down, Toyoya seemed to be asleep. One hand holds Toyoya, and the other hand goes to Toyoya's forehead. At the tentacle, the palm was hot, and the old guy had a high fever. Excessive blood loss, plus infection, no matter how high you work, you will not be the opponent of small bacteria.

Put Toyoya on the ground and tear a piece of his shirt and dip it in water to cool him.

After a long time, Toyoya woke up and asked weakly, "Why don't you leave?"

Yun Feng said: "There is no way." Isn't it there?"

Feng Gu lifted his spirits, his consciousness was released, and he said excitedly: "There, do you see it, it's that spring." Put your hand in and you'll touch a rope. Grab the rope and pull hard, and a hole will appear. Then climb up from the hole. ”

Yun Feng was stunned, which was not the same as what Ye Lao said. The mechanism that opens the secret passage should be on the wall of the cave on one side. The small cave that sprayed water was the source of the underground river. Under normal circumstances, if someone walks here and wants to find an exit, they will most likely start here. Therefore, after the original setting was a water spray cave, Ye Lao and they set up a water-holding space shaped like a reservoir. If someone forcibly excavates an exit from here, the stagnant water behind it will surely rush down, and people will rush into the underground river.

Toyoya actually said that the switch is here, does he want to kill himself? Impossible, once the water hits down, he will also be swept away by the water. He may not die, but his sick and crippled body will surely die.

Oh. Yun Feng immediately reacted, probably because this guy changed the settings for the opening of the secret passage. His eyes glanced vaguely at the direction that Ye Lao said, and as expected, there was actually a spring flowing out there. It seems that Toyoya led the stagnant water in that direction. If you really want to open the secret passage in the way Ye Lao said, you will definitely be greeted by a flood and the rocks washed out of it, and the exit of the secret passage will completely collapse and block.

Fortunately, I brought this guy and didn't kill him directly. According to Toyoya's instructions, Gao Yuanfeng reached into the hole where water was constantly spraying out, and sure enough, he touched a rope woven from an unknown material. Pull hard. Boom, boom, as if the water pressure switch was activated, a cave just big enough for people to enter slowly appeared in front of him.

Yunfeng didn't talk nonsense, picked up Fenggu again, and groped forward.

The cave slopes upwards and becomes steeper. He had to tie the leopard to his chest and use his hands and feet. After climbing for about half a day, I finally saw a bright light in front of me, and I got up my strength and ran towards the light. Crawling out of the hole, seeing the green, I took a deep breath, and I felt like I had returned to the world from hell.

It's a circular valley, like a huge casserole, as regular as if it had been dug out by man. The diameter of the valley bottom is about 300 meters, and it is surrounded by mountains that are inclined upwards at an angle of more than 40 degrees, and the peaks go straight into the sky, and the relative height is not less than 500 meters. The bottom of the valley is like a rotten iron pot with many holes, there is not much vegetation, there are many iron-red stones, and there are countless caves, and the surrounding mountains are just the opposite, covered with dense green vegetation. A few other streams, gurgling down the hill, into a cave at the bottom of the valley, disappeared.

Although Yun Feng was a little prepared, he was still shocked by the scenery in front of him, and he was amazed, if it was artificially excavated, the amount of work was too large, if it was naturally formed, it was too regular, almost a standard circle.

Pretend

(This chapter is not finished, please turn the page)

"Hey, hey, old man, you're not dead." Where are we here, it won't be the Danding of the immortals. Because of the change in his perception of Fenggu, he didn't want to be honored anymore, so he called him an old man. The purpose of saying this is to ask the specific name of this place. Ye Lao only said that it was the base of Qinglong Mountain, and did not say what mountain or peak it was specifically called.

Feng Gu said angrily: "I have never seen the little things in the world, immortals are also people, who can use such a big tripod." One thing is almost blinded by you, this place is called Tianding Mountain, it is said that it was a large volcano a long time ago, and then for some reason, once the volcanic lava retreated, it left such a place, and the dense caves under our feet. Don't make a fuss, on the left side of the front, a hundred and ten meters up the stream, there is a cave, and the treasure is there. Let's go, don't be in a daze. By the way, you take five steps back. There is a stone in the lower left corner of one side of the cave. Lift the stone with great force, and there is also a rope inside. Pull hard enough to close the cave we came into. ”

Yunfeng nodded and did obediently. The method of closing the secret passage has not changed.

After closing the entrance, Yunfeng picked up Fenggu and came to the edge of the stream, a pair of eyes and bones were spinning, and he couldn't find the way, the grass was deep and dense, and there was no way to settle, "Old man, where did you get from?"

Feng Gu was so angry that he hit the back of Yunfeng's head with his only hand, "Why are you so stupid, wading through the water, walking along the water." ”

Yun Feng was about to take a step, and then took it back, "Is there any prohibition such as a formation? "The method that Ye Lao said is not like this. is already about to arrive at the base, and Yunfeng has to prepare whether Fenggu will plot against him.

Fenggu said angrily, "Bastard, no. What about the formation, isn't that three hundred taels of silver here, tell others that you have a secret here? Although this place is inaccessible, what if someone comes in by mistake? Only natural can it be kept secret, and once there are traces of man-made, it will provoke people to excavate. Yunfeng shouted to the old man Fenggu, and Fenggu was no longer so polite. Both of them knew that each other was about to have a showdown, so they didn't bother to keep the mask of hypocrisy.

Yun Feng thought about it, and still followed Feng Gu's guidance and went upstream. One reason is that Toyoya is in his arms, and if he wants to die, he can't run away. The other is to admire Fenggu's changes, which seem more natural and obviously more reasonable than Ye Lao's settings.

Fortunately, Yun Feng's cultivation for more than a month has been quite effective, although he was tired and out of breath, he also successfully arrived at his destination, a very shallow natural cave. It was more than one person high, two meters wide, and the hole was no more than three meters deep, and it was clear at a glance that there was nothing but stones and a little moss.

Yun Feng knew that it had arrived, but he deliberately scratched his head and said suspiciously, "Are you sure this is here? ”

Toyoya affirmed, "That's right. Put me down. Yunfeng untied the two leopards and a crippled man and settled them down. Follow Toyoya's instructions to bring a few large stones to step on, then stand up and remove a small stone in the upper left corner. Behind the stone is an irregular hole that looks like a natural stone crevice, just big enough for a hand. Reach in as far as you can and feel for a rope loop that looks like a tree root. Hold it with your hand and pull it out, you can hear a rattling sound, and a boulder in the upper right corner of the stone cave slowly retracts into the stone wall, revealing a grotto with a radius of one meter. After restoring the activation mechanism, he stuffed Toyoya and the leopard into the cave, and scurried upwards and crawled into the darkness.

The inside of the cave is very smooth, about ten meters forward in the dark with Fenggu on his back, Fenggu presses it somewhere on the wall of the cave, and suddenly the light shines, and the scenery in the cave is clearly presented. Yun Feng was first shocked not by the ghostly structure, but by the lamp, and shouted in a lost voice, "Electric light!?" The round or long luminous bodies were clearly the same as the one that found Tianfeng

(This chapter is not finished, please turn the page)

The research bases of the 'Flying Immortals' are very similar.

Feng Gu didn't hear Yun Feng's words clearly, or he didn't know what he meant, "What the hell are you called, go and close the door first." ”

"Wait, wait, tell me if those glowing things are electric lights. Yunfeng was overjoyed. Ye Lao's hatred for the Flying Immortals outside the Heavens caused him to hate things and Wu, and of course there were also reasons why he thought that the Flying Immortals outside the Heavens were too dependent on foreign objects and were not conducive to cultivation, so he strongly rejected the things of the Flying Immortals outside the Heavens. It is impossible to allow the appearance of extraterrestrial immortals in the base. Therefore, these electric lighting objects are definitely not the things of the north branch of Tianmen.

The great joy is that Yun Feng himself not only does not reject the immortal book, but is also extremely enthusiastic. Tianfeng opened up the north-south passage of Yanhui Mountain, the integration, improvement, and creation of martial arts, and the reshaping of the body, all of which gave him imaginative help. If this base also has immortal books and immortals, how can Yun Feng not be overjoyed.

"Light the lamp? Light the lamp, do you see me making a fire? It's light jade, and if you feed it aura, you can shine. Go and close the door, do you see the turntable? Pull it hard to the right until you hear a click, indicating that the scraper is locked and the spring is reset, and it is closed. "Toyoya had never heard of the word electric light, so he thought it was a lamp.

Yun Feng didn't give up, "How do you feed them with aura? I obviously saw that you just pressed the switch, and it wasn't one on, but it was all on, which means that there is a cable connection between them, right?"

Yun Feng's heart was pounding, because although Feng Gu said it easily, it was likely to be an epoch-making initiative, and the initiative that Tianfeng had not solved was how to use life on utensils. The internal power of a human being can be amplified by spiritual weapons to attack enemies, but it is difficult to find a storage device other than the human body itself, and it is difficult to use it for other purposes.

If these two problems can be solved, then it will be easy to convert life energy into other energy, and the fundamental problem of using spirit crystals as the energy source of fairy puppets and even fairy boats will be solved. There is no electronic industrial base on this planet, and it is not easy to produce generators, let alone nuclear reactors. If you can use spirit crystals as energy, some of the equipment and robots preserved in Tianfeng's base will not be short of energy, and some remaining immortal weapons (laser guns, laser swords) and so on can also be used.

"For your size, there is time, close the door and turn back slowly before it's too late. Toyoya was impatient, cautious, even though he knew that no one was outside, he still felt that he had to close the door before he could be safe.

"Okay, okay, don't be angry. "Running to the turntable and turning it hard, the traction shaft slowly pushed the stone blocking the door to its place, and if you look from the outside, it is exactly the same as before they came in, even if someone comes here unintentionally, you will never find out the secret inside the cave.

At the request of Yunfeng, Toyoya first decrypted the luminous body for him. It was true that the light jade was not a light bulb, but a mineral crystal. There are cables connected between the jades, but they are still not cables, because they are not copper, iron and aluminum wires, but a non-metal.

According to Toyoya, it is the spiritual power that is transmitted, and the energy is not supplied by a battery or a generator, but a crystal the size of a bucket, which Toyoya calls the storage spirit jade. The monk can input the Xuan Power into it and store it for later use, and channeling it to the light jade to shine is only one of the applications, and the monk can absorb the Xuan Power to replenish himself when the Xuan Power is exhausted.

Isn't this just a kind of development and application of spirit crystals? Yun Feng was already in ecstasy, and he was determined to bring Tianfeng here as soon as possible to study it. blurted out, "Where did you get this set of things?" As soon as the question came out, it was immediately revealed that his identity was not simple, at least he knew that there was no such thing in the base.

(End of chapter)