Ge Wei leaned over and asked, "Doctor Du, what is this?" ”

Durin didn't look back, "Liquid nitrogen." ”

Everyone had gone to college, and it quickly became clear what Doolin was doing.

Du Lin first burned the hinges of the stone door with a high-temperature flame until they were hot, and then injected liquid nitrogen at an ultra-low temperature of -196 degrees Celsius, so that the stone became brittle and cracked under the action of heat expansion and cold contraction, so that the hinges of the stone door lost their fixed effect.

Ge Wei also came up to help, and after the two of them repeated the heating and cooling of the cracks of the two stone doors several times, the stone components at the hinges on both sides of the stone doors completely shattered, and the stone doors became two ordinary large stone slabs.

"Come here to help!" Du Lin beckoned, Luo Fuan and He Wenwen also stepped forward and pushed the stone gate together, and after a tooth-squeaking sound, the stone gate fell down with a bang, making a loud noise and stirring up a choking cloud of smoke. Several people hurriedly put on their breathing masks again, otherwise they would not be able to breathe at all.

It wasn't until a few minutes later that the smoke and dust gradually cleared, and a black hole appeared in front of everyone.

You don't need to see it, just listening to the echo of the stone gate when it falls, you can tell that the space inside must be very huge.

Suddenly, a bright spot appeared in the darkness, and then several bright spots lit up, followed by dozens of bright spots, completely illuminating a burial chamber that was much larger than the one just now.

Durin asked the others to wait outside the tomb, and walked into the tomb alone, although there was a little light, but the shadow was even more terrifying.

The bright spot in the tomb is called "Changming lamp", but it is not actually "Changming", at most it is a "spontaneous combustion lamp", and the lamp oil and twist of this lamp are mixed with some "cold phosphorus".

This cold phosphorus is also a kind of phosphate rock, and the ignition point of white phosphorus is 40 degrees Celsius, but under the action of oxidation, when the temperature is less than 40 degrees Celsius, it may also spontaneously combust due to local exceeding 40 degrees Celsius.

However, cold phosphorus is different from white phosphorus, it may spontaneously combust at 30 degrees Celsius, so this ore is produced in the extreme arctic cold land, and the transportation process is also extremely dangerous, and the slightest carelessness will cause a catastrophe, so it is extremely rare in ancient times.

In ancient times, after the death of a person with a very high status, this kind of everlasting lamp would be placed in the tomb, and after the tomb door was closed, the lamp continued to burn until the oxygen in the tomb was consumed, and it was naturally extinguished, which also played a certain role in preventing oxidation.

When the chamber was opened again, fresh air entered, and the lantern began to spontaneously combust.

Under the reflection of the ever-bright lamp, you can see that the whole tomb is very spacious and tall, and it is inferred from the direction that this should be deep into the belly of the mountain, which can be seen that this is a large tomb with the mountain as the mound, compared with the scale of this tomb, the tomb of Cheng Taiyi outside can only be regarded as a small tomb.

Before Cheng Yulin was reincarnated, he told Du Lin that there was a "big secret" in his tomb. Now it seems that Cheng Yu has somewhat exalted himself, which is obviously because he borrowed a small piece of land in a "big secret" to build his own grave.

The starry lanterns are arranged according to the twenty-eight constellations in the night sky, and a coffin is placed on a high platform more than one meter high in the middle.

Yes, it is a "coffin".

A coffin is a coffin, a coffin is a coffin, these are two kinds of things. The coffin is a container for the corpse, and the coffin is used to protect the coffin. At the same time, the use of the coffin also reflects the noble identity of the tomb owner, because in ancient times, only the person who was crowned a king, or had the title of marquis or above, was eligible to use the "coffin".

Du Lin said softly: "Senior brother, I didn't expect that I was the one who designed your tomb back then, and now I am the one who comes to dig your tomb." ”

Readers with a good memory may have guessed that the owner of this tomb is a strange man in the early Ming Dynasty and Du Lin's senior brother - Liu Ji and Liu Bowen.

As mentioned above, Du Lin was a soldier under Zhu Chongba (later renamed Zhu Yuanzhang) at the end of the Yuan Dynasty and the beginning of the Ming Dynasty, and met Liu Bowen one day, and Liu Bowen found out that he had not aged for many years, so he introduced Du Lin to his master Zhang Jinghe, Zhang Jinghe asked Du Lin to worship Liu Bowen as a teacher, but in fact, he personally taught Du Lin, and Liu Bowen was Du Lin's senior brother.

But it may be because Liu Bowen leaked too many heavenly opportunities in his life, and after escaping the turmoil of Taizu's killing of heroes in the early Ming Dynasty, he did not have a long life, and died at the age of 64.

You must know that his master Zhang Jinghe has lived for more than a hundred years, even if there is a part of Du Lin's immortal blood, but with Zhang Zhenren's own health regimen, it is not a problem to live to eighty.

As a result, Liu Bowen, an apprentice, died in front of the master.

Because Liu Bowen made too much credit when he established the Ming Dynasty, and after the Dingding Central Plains, he retreated bravely in time, which made Taizu very appreciative, and gave him skilled craftsmen to help him repair the tomb in advance.

Liu Bowen is a good person, and he never believes that Zhu Yuanzhang's "tomb" will be so simple.

The emperor rewarded the ministers with mansions, fiefdoms, wives, and money, and I had never heard of them even bringing cemeteries! Even if he Zhu Yuanzhang had no culture and didn't understand these big truths, the common people should always understand the sophistication of the people, right? Aren't you cursing Liu Bowen to die early?

So there must be another reason.

The efficiency of the royal construction team was very high, and soon the tomb pit was dug and the construction of the main structure began, but it was difficult to design the anti-tomb methods, because at that time, the conventional anti-tomb methods had been completely cracked by the tomb robbers, so new methods and new ideas were urgently needed.

Liu Bowen also saw that the emperor was planning to lend him the opportunity to repair the tomb, train the imperial tomb construction team, and at the same time accumulate experience in designing anti-theft devices for the imperial tomb.

As a minister, he naturally wanted to relieve his worries for the king, and Liu Bowen entrusted the design of the anti-theft device to the junior brother, that is, Du Lin.

At that time, Du Lin was learning the secret art of feng shui from Zhang Jinghe, and he was also very interested in the matter of tombs.

Durin studied for months without sleeping or eating (in fact, he didn't need to eat or sleep in the first place), and devised more than a dozen ways to prevent tomb robbery.

In fact, Dulin's design does not have too many technical innovations, but focuses on the use of various anti-tomb robbery methods, so that a variety of anti-tomb devices become a complete set of defense systems that "affect the whole body".

For example, the previous set of "flap array" is a pass designed by Durin by fusing ordinary flaps with mazes.

After Liu Bowen repaired the tomb according to Du Lin's design drawing, he handed over the design to Zhu Yuanzhang, the emperor Longxin Dayue, and specially approved Liu Bowen to be upgraded to be buried according to the princely system after a hundred years, which is why Liu Bowen has the princely treatment of the inner coffin and the outer coffin as an earl of "sincerity".

According to Dürin's design at the time, most of the anti-robbery measures were concentrated in this main burial chamber.

So in the next ten minutes, He Wenwen and others, who were waiting outside the tomb, heard all kinds of strange and huge sounds such as "ping pong", "whooshing" and "booming" coming from inside, followed by a large amount of smoke and dust pouring out of the tomb door.

The three of them were terrified outside, He Wenwen was worried that Du Lin was in danger, and wanted to rush in several times, but she was afraid that after entering, she would become a burden to Du Lin, and her heart was in a dilemma.

After the dust settled, the intact Durin walked out of the tomb door, patted the dust on his body, and waved his hand,

"Go inside, there's no danger inside. ”

Luo Fuan took the lead and rushed into the tomb, He Wenwen hurried over to see if Du Lin was injured, Ge Wei also wanted to care a few words, but seeing He Wenwen and Du Lin's intimate appearance, he felt that it was better not to be a light bulb, so he also followed Luo Fuan into the tomb.

The burial chamber was a mess, the ground was full of bows, throwing knives, boulders, pits, some of the ground was still corroded by an unknown fishy liquid, and white smoke was still emitting from it, and several permanent lamps were knocked down, and the lamp oil was spilled all over the ground, and it was still in flames......

Luo Fuan looked at all this, and was stunned, so many deadly mechanisms, if he broke into it rashly, it was estimated that he would not be able to die for ten lives.

Fortunately, Du Lin's kid helped him wade through the thunder, and now all the archaeological results in this tomb are his own, and it feels cool to think about it.