"Have we discovered new humans, birdmen who can fly?" Liu Kunlun whistled. He was not shocked because he saw a person with wings on the mural just now.

Ding Jiajun stepped forward to check. He put on gloves, picked up two bones and looked at it, saying, "It's not a bird man, this may be a monk and priest. Gu Xiangxiong admires the big roll bird the most. Look, the bones on the wings are hollow, obviously bird bones, which are completely different from human bones. I have measured the height and weight of this person, and the area of ​​the wings. The lift generated by the wings is not enough to drive the human body, so the wings and the humans are not the original wife, but are burial objects."

There is a scientist around you that is different. It can solve a mystery in just a few words. Liu Kunlun and Ji Yufan suddenly realized and gave a thumbs up to show their approval.

Everything in the underwater cave is the same as described. The gold stored alone is worthless. Gold is the most stable substance. After thousands of years, there is no rust. There is no dust in the cave. These gold coins shine brightly under the faint light.

Ding Jiajun picked up a gold coin and looked at it, saying, "This is a gold coin from ancient India, with Sanskrit on it, and it was about 100 BC."

"It's indeed an archaeological master." Liu Kunlun praised.

Ding Jiajun searched for it and picked up another gold coin to identify it. "Well, this one is interesting. This is a commemorative coin from the Ptolemaic dynasty in ancient Egypt. It was issued in the third century BC. The avatar on it is Queen Alsinoy. It seems that the business of the Xiangxiong Dynasty was very developed. Can you imagine that during the Qin Dynasty, there were such a developed civilization on the Qinghai-Tibet Plateau. North Africa and India merchants met here, and of course there were business travelers from the Central Plains. They traded silk, handicrafts, various rare beasts, and even slaves. Just like you said, I really want to take a look. By the way, what triggered the phantom?"

Liu Kunlun recalled that when the Bigfoot was punched by himself, he retreated to the edge of the stone wall. Ji Yufan picked up the weapon and threw it to him, and the next moment the phantom came.

Based on his memory, he walked to the location where Bigfoot was at that time, groped on the stone wall for a long time, and found the secret mechanism. A metal handle on the wall, to be precise, a gold handle, which looked like a switch from the 1980s. The grip part was wrapped in turquoise. There were many things like the Qinghai-Tibet Plateau. Tibetans like turquoise just like the people in the Central Plains like white jade.

"It's ready, here!" Liu Kunlun pulled the hand gate, but no phantom appeared. He waited for a while, pushed it up and pulled it down again, but there was still nothing.

Ding Jiajun stepped forward to observe. The handgate was embedded in the cold wall. It was exquisitely crafted, but it was far from the level of industrial processing. The strange thing was that this wall was dark and cold.

"This is not a stone wall, this is a metal." Ding Jiajun said, "What kind of metal is still to be verified, but I am afraid that this metal processing ability is not what the Xiangxiong civilization should have."

As he said that, Ding Jiajun searched for a gap along the wall, found a door behind a pile of bronze ware, opened it, and there was a unique world. The three of them walked into it and illuminated it with light. In front of them was a large pit similar to a swimming pool, square, and there were neatly arranged dark gray metal plates in the pit, with gold columns above it, and a golden thread was placed on it, leading to a shaft-like object wrapped around countless circles of gold threads above.

When it is connected with the golden turquoise handle outside, it is a huge machine composed of gears and escapement mechanisms. Many parts are not named. Liu Kunlun remembers that when he was a child, his father repaired a video recorder imported from Japan. It is no less clever than a Japanese video recorder, but the size is enlarged.

Ding Jiajun watched the flashlight for a long time and finally concluded, "I have a bold assumption that this pool is actually a large battery pack. The pool was originally filled with aqueous sulfuric acid solution. The metal plates were lead plates. The lead acid reacted chemically and was transmitted to the machine through the pole columns of gold and wires. This machine is a home theater system powered by electricity. Well, it is not a video tape, but a video disc."

The two listeners felt that their imagination was not enough. The Xiangxiong people in BC could generate electricity and create video discs, which was too amazing.

"Look, the DVD is still inside, but there is no power, and we can't see the contents of the DVD." Ding Jiajun said, pointing to a place in the machine.

Liu Kunlun came forward to observe and saw a round dish-shaped object, which seemed familiar. He remembered that Li Ming once found a batch of stone plates on Bayankara Mountain, which were similar in size to this one.

He told Ding Jiajun about this incident. Dr. Ding had long heard of the famous Bayankala stone plate. The so-called alien remains circulating in the outside world are pure imagination. In fact, the stone plate does exist, but no one can decipher it.

"I have an idea. I build a model and analyze the data of this battery. We use lithium batteries to simulate power supply, and maybe we can release the contents in the disc." Ding Jiajun's idea is very exciting, but it is also difficult to operate. This is a huge project, and it is probably impossible to complete it with only three people.

Liu Kunlun was ready to beat his hands and couldn't wait, "We have batteries in our car, so we need to disassemble as much as we want. Dr. Ding, please bring the computer. Hurry up and model it and calculate it."

Ding Jiajun measured the battery data. It was really a battery, a whole pool of batteries. Then the three of them left, inspected the cave, took a few cultural relics, and still put on diving suits and went out. They returned to the camp and started work overnight.

The facts prove that this job is not that simple. Using modern technology to analyze the scientific and technological tree of ancient civilizations will cause deviations if you are not careful. Ding Jiajun did not calculate the result overnight. He couldn't figure out how the sine wave DC power generated by this huge battery supplies the huge DVD player above. The working principle of the DVD player also needs to be verified, because this is not an ordinary DVD player, it is a super DVD that can create holographic images, and its ability to process data is even more powerful than the world's strongest supercomputer at present.

Liu Kunlun is doing a good job. Now the battery technology is much more developed than ten years ago. New energy vehicles account for a huge majority in the city. It is just that the convenience of replacing batteries in unmanned areas and fuel vehicles are still used. However, these vehicles are also equipped with large capacity batteries, which are hybrid. They have dismantled many batteries and can be combined into a large battery pack. However, the batteries are quite heavy. It is a physical job to transport these batteries to underwater caves.

They were doing this for the next few days, transporting batteries, diving, and recombining batteries in underwater caves. Ding Jiajun also carefully studied the DVD player. He identified the transformer, capacitor and Tesla coil, and was amazed at the wisdom of the ancients.

Ding Jiajun said that someone once discovered an original dry battery at an Iraqi site. A small clay pot contains asphalt, and there is an iron rod containing asphalt wrapped in the asphalt. The production time of this thing should have been in the second century BC. According to research, it is indeed a chemical battery, but it is only used for electrolytic gold plating.

"The civilization more than two thousand years ago mastered the use of chemical batteries, which is amazing." Ding Jiajun shook his head and sighed in great emotion.

"But why is it lost?" Liu Kunlun asked him.

"Because the social system in ancient times determined that craftsmen would not teach their unique skills at will, just like our ancestors, they passed on to the inside but not the outside, and they passed on to the daughters. The bronze sword manufacturing process of the Warring States Period is extremely exquisite at present, but it has not been passed on because of its confidentiality."

The battery pack was in place and the connection was completed, and the three of them were uneasy. If they were not able to burn the ancient video disc machine, they would be too guilty.

Ding Jiajun said, "It won't be a problem. I'll control the voltage below the safety value."

Liu Kunlun pulled the hand brake, but there was no reaction, and the DVD player did not work.

Ding Jiajun rubbed his chin and said, "What's wrong, I'll take a look." He walked around the battery several times and suddenly realized, "I'm too stupid, fixed-based thinking. This is not a lead-acid battery, this is an alkaline battery! The lake water outside is an alkali solution. When the lake water is introduced, the battery can be used."

The idea is right, the work is naturally smooth. It took some time to find the import of electrolyte and also saw the exquisiteness of the ancients. The water supply and drainage system was designed very advanced. Seeing the alkaline water injected into the battery bit by bit, Ding Jiajun talked endlessly about basic physics.

Liu Kunlun said, "You have a solid foundation. You are more than enough to be a high school physics teacher, and you are still the kind of senior high school class teacher."

Ding Jiajun said, "I like science since I was a child, but I was forced to study liberal arts by Teacher Shao. When I was bored, I like to do Olympiad problems to solve my boredom. I also like to do five years of simulation and three years of college entrance examination questions to pass the time. By the way, I have a secret. I told you that the last math problem I had in the college entrance examination last year was the one I gave."

The two walked aside and ignored him.

After the alkali solution fills the pool, it stops automatically. The three of them exit, suppressing their excitement and waiting to watch the ancient drama begin.

"Are you ready?" Liu Kunlun said, "I suggest you take a piece of nitroglycerin or something, be careful that your heart can't stand it."

"I can hold it, let's start." Ding Jiajun nodded with a calm expression, and I don't know if he was pretending.

Liu Kunlun pulled the hand gate.

The music started, the cave was bright, the singing and dancing were still the same, the banquet was still the same, the singers sang and danced, and the murals on the wall were as bright as before, and this scene repeated.

"Doctor, look, lifelike, try to touch it." Liu Kunlun said to Ding Jiajun, but the latter looked confused.

"Can you see it?" Ding Jiajun asked, "but I can't see anything." As he said that, he pulled down the hand gate.

The phantom disappeared, and the underwater cave returned to darkness and gloomy.

"This is not a DVD player, nor is this a holographic image." Ding Jiajun was worried. "It's much more complicated than I thought. This is the radio wave directly acting on the cerebral cortex that loads information. I wonder what the Tesla coil is for? So that's it."

"Why can't you see it?" Ji Yufan asked.

"Just like someone can see ghosts and someone can't see them, the brain's reception of radio waves in certain frequency bands is not the same." Ding Jiajun gave a seemingly reasonable explanation, "You two have the same constitution, and I'm different from you."

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Chapter completed!