The Tang Dynasty was strong, and Li Shimin, Taizong of the Tang Dynasty, created the burial system of "relying on the mountain as the mausoleum", so most of the tombs in the Tang Dynasty were huge. As the joint burial tomb of Tang Gaozong Li Zhi and Wu Zetian, Qianling can be called a national tomb, and the construction of Qianling is also in the heyday of the Tang Dynasty, and the construction of Qianling can be said to cover all aspects of top construction and feng shui.

Zhang De frantically absorbed all kinds of knowledge, and until the construction of the Qianling Tomb was completed, Zhang De recorded a lot of various knowledge.

Since ancient times, the secrecy of the tombs has been mainly hidden, and many excellent craftsmen have been killed because they participated in the construction of the tombs. But I didn't expect that the Tang Dynasty's "mountain as a mausoleum" burial system not only had a solid tomb structure, but also saved the lives of many tomb craftsmen like Zhang De.

The Tang tomb is solid, especially the national tomb like Qianling, which covers a wide area, takes a long time to build, and uses many builders, so it can't be hidden, relying on the solid structure of real materials, so that the tomb robbers can't get down if they want to.

In the early years of the Republic of China, warlords fought and excavated ancient tombs became a common practice. Under the guise of protecting Qianling, Kuomintang general Sun Lianzhong once led his subordinates to garrison Qianling, and used the method of real guns and artillery exercises to cover the troops of a division to steal and excavate Qianling. The soldiers used explosives to blow up many places, but they did not even find the entrance to the tomb, which shows the solidity of the Qianling.

Therefore, there was no such thing as a tomb craftsman dying in the Tang Dynasty. After the construction of the Qianling Tomb was completed, Zhang De was not only not killed, but was also assigned to the Tang Dynasty's construction department because of his meritorious service. After returning home, he compiled what he had learned over the years into two books, titled "Civil Engineering Collection". The civil engineering collection is divided into two volumes, the earth collection talks about feng shui, and the wood collection talks about construction.

But later, for unknown reasons, although Zhang De's grandson also learned Zhang De's skills, he did not inherit his mantle, but started the business of tomb robbing. In the eyes of tomb robbers, Zhang De's civil engineering collection turned out to be a guidebook for tomb robbing.

With the technical guidance left by Zhang De, Zhang De's grandson started to rob the tomb. Later, Zhang De's grandson also recorded the techniques of the mechanisms in the tomb that he encountered in his years of tomb robbing and compiled them into a collection of works. At this point, the "Civil Engineering Collection" was roughly formed.

For more than a thousand years, these three books fell into the hands of many people, most of whom were tomb robbers. Nearly every generation of book owners would rewrite these books, adding their own unique insights on the three aspects of the books and some of their experiences of stealing tombs, and recording their experiences of obtaining ancient books.

Some of the successive owners of these books were tomb robbers and became masters through this set of ancient books, and some people became monks halfway after getting ancient books and started tomb robberies with the help of ancient books. Because of this, for thousands of years, although the written language is not universal, these books have been changed from generation to generation and passed down in the hands of generations of tomb robbers. The last person to write it was none other than Chen Ziyang's grandfather.

At the end of the book, Chen Ziyang's grandfather recorded in detail the structure of the Seven Dead Guardian Tomb in Shandong and his father's tomb robbery. It records how they discovered the tomb, the surrounding environment of the tomb, the angle and length of the cave, the placement and shape of the sarcophagus inside the tomb, and the whole process of his father's tomb robbery and the final iron bar mechanism and mercury oozing.

Although Chen Ziyang's grandfather didn't know how his father found the real sarcophagus, judging from the body and burial goods in the sarcophagus, the sarcophagus that Chen Zhongde opened at the beginning was a real coffin. But since the real coffin was opened, why was there mercury later, when was the mechanism triggered, and where was the mercury hidden. Chen Ziyang's grandfather analyzed these questions hidden in his heart in the book. Annotations are made to the results of various analyses that he thinks are probable.

Among them, Chen Ziyang's grandfather thinks that the most likely explanation is that the mechanism that triggers the mercury is hidden under the real coffin, and when Chen Zhongde uses the "back to lift the coffin" to open the sarcophagus, he exerts force under his feet and triggers the mechanism, but because he was too hard at the time and didn't notice it. The mercury was hidden in the stone pillar in the middle of the burial chamber, and as the mechanism was opened, the mercury flowed down and seeped through the cracks in the floor tiles.

After reading this, Chen Ziyang thought that although his grandfather's guess seemed reasonable, but if he thought about it, there were many loopholes, the density of mercury was very large, so much mercury must be very heavy, even if there was a mechanism that could hold so much mercury, if the tomb existed for a short time, it would be okay, and after a long time, the mechanism would be invalidated by the mercury, as long as the mechanism failed a little, even a trace of the gap was opened, the pungent smell of mercury would definitely be discovered in advance by his grandfather Chen Zhongde.

Therefore, Chen Ziyang thinks that either this tomb has not been built for a long time, and the mechanism has not failed, or his grandfather's analysis is simply incorrect. As for the real cause of Chen Zhongde's death, it seems that he can only go to the tomb to take a look, but he doesn't know what happened to the incorruptible body in the coffin now, if this corpse becomes a white murderer, it will be bad. There is still a lot of treasure in the coffin, so take one out and give it away.

Chen Ziyang was dreaming of making a fortune, but he patted his head and thought too much, now he can't even afford a train ticket to Shandong. It seems that the time has not yet come, so let's put these things aside for the time being.

Two months of study made Chen Ziyang completely become an otaku, Yang Lei's general manager of white affairs is doing a good job, but he has been without a drop of water for two months. Life is hard.

More than two months were not wasted, and after Chen Ziyang thoroughly read the content of the book, he learned the skills of tomb robbing. Chen Ziyang is a master of Maoshan Mountain, and his ability to find dragon points is stronger than the sum of the records in the book, but how to judge the structure of the tomb and the location of the tomb according to various information, how to dig a robbery hole, and how to crack and prevent the mechanism in the tomb These knowledge is not Chen Ziyang, but this knowledge is also much easier to learn than looking for dragon points.

In the past, Chen Ziyang learned the orthodox art of the earth master from the old Taoist master, but most of what he learned in the books were partial doors, but it was these partial knowledge that made Chen Ziyang feel that he benefited a lot, just like the positive and negative sides of the coin and yin and yang, through the study of these ancient books, Chen Ziyang had a strange feeling, as if he should have known these knowledge, and now that he has learned it, he feels that he has become complete. Chen Ziyang felt very strange about his own feelings.

After more than two months of retreat, Chen Ziyang decided to go out and have some fun. Last time, Yang Lei said that he was going to go to the Weizi River in the lower reaches of the Yalu River to play. The Weizi River is next to the most beautiful Jinyin Gorge of the Yalu River, and now it has been developed into a summer resort area, which is a good place, and it is the end of July, the hottest time of the year, it is not bad to go there to play, to be able to sober up your mind, and think about how you should go in the future. After Chen Ziyang decided, he picked up the phone.