Shichima apparently guessed the way to open the lock from the style and appearance of the chest, but at a glance realized that the key to opening the box had something to do with the light.

First of all, the light in the wooden house was dim, the building materials of the wooden house may have been mixed with building materials that blocked the light, the windows were closed, and the only entrance and exit was only the door made of Kunlun soul wood.

The other is the blurred carving on the bright yellow box, a radial pattern represents the sun, and under the light source is a box pattern in different directions.

The thought flashed like lightning, and the seven blurted out the "light source".

Han Qingxin said suspiciously: "Light and shadow unlocking technology? This technology is no stranger to her, light and shadow has made great progress in modern scientific and technological research, but light and shadow as a locking technology is still under development, through the sensitive photoresistor to determine the intensity of light. Because the light intensity received by the object in different directions is not the same, the more sensitive photoresistor is called the shadow resistor arranged at the backlight, which is used with the light-sensitive element under the light to form a specific light and shadow password, and the angle of the furnishing and the light source received reach a certain intensity, and the lock will naturally be opened.

In short, the light and shadow unlocking technology is more complex in practical use, and the password can be complicated and messy, no less than the digital password.

The fat man was surprised: "It sounds so powerful, the people of Guloulan are so smart." Then why didn't the Han Dynasty be destroyed? ”

Zhu Beichen shook his head and said, "Do you still think that everything here is the masterpiece of the Guloulan people?" ”

Leaving this issue aside, it doesn't matter who built it, they have experienced things that go far beyond the technology of the Loulan period. Moreover, Tong Bingyang also proved that the ancient city of Shabu has nothing to do with the ancient kingdom of Loulan, as for whether it was done by the ancestors of Loulan earlier, he does not know.

Reminded by Qijian, Zhu Beichen half-squatted down and stroked the carvings on the four sides of the box, indeed as he said, the carving was exactly the same object as this box, and the three-dimensional carving technique presented all sides of the box, and in this way prompted the password to open the box.

The problem is that no one has ever seen the light and shadow combination lock, each direction represents a set of passwords, and how to move the box with the light source is a headache.

"How?" Zhu Beichen asked Qijian suspiciously.

Shichima shrugged, and the question was a little ridiculous: "Can people tell you that this box uses a light and shadow lock, do they have to tell you the code as well, so why don't you open the box and put it here and wait for you?" ”

Realizing that he had asked an extremely stupid question, Zhu Beichen smiled awkwardly.

"First of all, we must determine a few points, first, the position of the box from the light source, what is the accurate value, assuming that the box is using a photoresistor, the more sensitive it is, the higher the accurate value."

"Second, the placement angle, which determines the intensity of the light source, also requires an accurate value."

"Third, the strength of the light source. The light outside is changing all the time, and the light source time required to turn on the light and shadow lock may only be a short moment of the day. ”

In short, under Han Qingxin's careful thinking and logical analysis, the answer is that the complexity of this lock has surpassed that of an electronic security lock constructed of the most sophisticated electronic components in the world today, and the wisdom required to open this lock is enough to steal any bank safe under the control of a top-notch security system.

The fat man was slightly disappointed, the harder the box was to open, the rarer the contents became: "So we can't do anything about it?" Ay. ”

"If I didn't mess around, I wouldn't believe that things thousands of years ago could be made so precisely, and I wouldn't have opened them casually."

The fat man still looked unwilling, the teapot he had just arrived was so broken, and he was still looking forward to what good things could be in the box.

I'm afraid that the bracket in this is not as simple as the fat man thinks, and the development of the bracket technology in the ancient tombs that are now known has reached a staggering level in ancient times, and it is afraid that it will cause more trouble if it is placed at will.

Qijian said: "No, you can't come nonsense, I'll take a look." ”

Now the clues in their hands, including the Sun Tomb, are inextricably linked to Loulan, and the degree of development of the mechanism technique of an era can be obtained through the tombs unearthed in the same period. Prior to this, the seven specially learned about the history of Loulan, since the founding of Loulan since the eighth generation of Loulan King tomb excavation learned that the layout of Loulan organs strictly follow the layout of the direction, it is estimated that it is also influenced by the Han culture, to fit the topographic pattern.

After sorting out the historical clues and looking at the pattern on the box, the context in Shichima's mind gradually became clear.

First of all, the geographical location of Loulan is a small country located in western China in ancient times. The national capital Loulan City is located in the northwest bank of Lop Nur, the southwest passes through the end, Jingjue, Kumi, Khotan, the north passes through the Cheshi, the northwest passes through Yanqi, the east is the white dragon pile, through Dunhuang, and the key point of the Silk Road.

After connecting the connections, and looking at the layout image of the pattern on the box, it is natural to understand the layout of the Western Regions countries that connected Loulan in history, and the location in the center is naturally the location of Loulan City, the capital of Loulan Kingdom. It's too rough to do that.

Qijian Dao: "What is the latitude and longitude of Loulan?" It seems to be talking to himself, and categorically rejects the ridiculous idea, a small box opening code can be combined with the latitude and longitude of Loulan, and what is placed in it is probably Loulan's heirloom jade seal.

Han Qingxin was puzzled: "East longitude 89°55'22", north latitude 40°29'55". What's wrong, what's wrong with latitude and longitude? "You mean this set of numbers has something to do with the distance between light and shadow?" ”

The speculation of the seven rooms is beyond reason, and after explaining it, he found that his ideas could not withstand scrutiny, and he did not dare to say that the speculation was somewhat accurate.

While thinking about it, I heard July's voice, "I think it's feasible, I can give it a try." ”

Hearing what Qiyue said, Qijian nodded and agreed, "The distribution of patterns representing the surrounding countries is just to highlight the central Loulan City, according to this judgment, the box needs to be moved according to the latitude and longitude, a total of six times need to be moved, the order of the array combination is heavy, let's try to follow the order, first turn 89 degrees, followed by 55 degrees." ”

After a while, the fat man and Zhu Beichen took on the role of porters, first placing the box directly facing the wooden house door, and the light hit the sunny side of the whole box through the wooden door. Shichima nodded to indicate that they could start, and since they didn't have professional measuring tools, the two of them could only roughly determine the angle by visual inspection. First tried to move left at an angle of 89 degrees, but the expected scene did not appear, similar to the slight click sound of the safe turning to the cipher gear, but the box did not react at all.

Are we all thinking wrong? Zhu Beichen looked suspiciously at Qijian, and Qijian avoided it and said coldly: "Continue to the next angle, it is not necessarily a photoresistor, after all, it is ancient, and I will talk about it when the whole set of numbers is finished." "His mind is very simple, and the slightest suspicion can be seen through by Shichima at a glance.

After turning around in the order of latitude, the light coming in from the doorway during the movement continued to transmit to different positions of the box until the movement was completed. The box was still the same, the bright yellow metallic luster shining brightly in the sunlight, without the slightest change.

The fat man was so anxious that he wanted to use a saw to cut open the box, but where was there such a tool in this line.

Just as Zhu Beichen also showed a look of disappointment on his face, an unusual light crossed the retina, leaving an imperceptible white light on the side of the golden metal box.

He jumped high in excitement, and a sound of joy from the fat man came from behind him.

"Don't rush, take your time, turn 40 degrees, 29 degrees, 55 degrees." Seven are in command.

The metal box was heavy, and the two of them were sweating profusely with every angle they turned, and they were just one step away. Zhu Beichen gritted his teeth and hinted at the fat man with his eyes, you are working hard.

The metal box rubbed against the place and made a sharp sound, and it was estimated that it turned to the left almost 55 degrees, and the fat man waved his hand: "Almost, don't turn around, I'm almost dizzy." ”

At this time, looking at the box again, there was no difference at all from before, and the two of them were panting and a little wilted.

"Wrong?" The fat man asked.

"That's right, that's right." Shichima affirmed, "Look at the pattern on the metal box, is there a clear difference from before? ”

After reminding them, they finally found the difference, the original box was a bright color, and they couldn't find it if they didn't pay attention to it, and the patterns on the boxes, the patterns of metal boxes in different directions had disappeared.

Immediately after, the tick-tock, turned into a click. From this, it can be seen that the internal mechanism of the metal box is in self-operation, and the box can be opened after the process is completed.

After waiting quietly for two minutes, the strange noise in the box stopped. Zhu Beichen's hanging heart fell to the ground suddenly, oh no, why didn't he move again?

Continuing to wait, time passed minute by minute, and after making sure that the box was completely still, the fat man couldn't help it: "You think the mechanism is too complicated or too simple, I haven't heard of the use of light and angle control lock opening and closing." ”

"Wait, take a closer look at the upper part." Han Qingxin squatted down to inspect the outer layer of the box, and a thin slit appeared on the box. Although her memory is not as demonic as Zhu Beichen, she still has the ability to observe nuances and short-term memory.

There was a smiling slit on the side of the metal box, and they froze when they saw it.

The fat man said: "Open it up and take a look, it's not in vain." ”

The fat man gave a thumbs up to Qijian: "Seventh brother is seventh brother, erudite and talented, only eight buckets tall." I almost blurted out that I would have to cooperate more in the future.

Zhu Beichen lifted the two sides of the box hard, and then turned it upwards vigorously. The lid was heavy, and it took a while to lift it as the strength increased. Holding his breath, his eyes carefully peeked into the half-opened lid.