After opening the safe in the wall of the master bedroom on the third floor, Jiang Shaoyou finally saw the ancient book that Huo Wuji said - "Tiangang Alchemy".

This is a hand-copied version of the ancient book, the book is not thick, only about 100 pages, the cover of the book has been seriously damaged, the pages are yellow and green, revealing a sense of vicissitudes of time.

But despite this, Jiang Shaoyou dared to conclude that this book should only be a manuscript from the Ming and Qing dynasties, and it is absolutely impossible that it was really handed down from the Tang Dynasty. But this doesn't matter, because the most precious thing about this book is not its cultural value, but its practical value!

Jiang Shaoyou picked up this book and looked through it briefly, and found that the records on it were indeed some wonderful alchemy secret techniques, and the production method of the soul chain in Jiang Shaoyou's hand was also impressively listed, according to the degree of difficulty, this soul chain ranked thirteenth, which was relatively difficult to refine.

In fact, in this book of alchemy written by Yuan Tiangang, the most core thing is some Qimen formations. It's just that the structure of these formations is extremely complicated, even if you only look at the drawings of the simplest formation, it will make people feel dizzy, not to mention that these complicated formations have to be carved into small gold and silver jewelry, this difficulty will definitely not be easier than carving a "Qingming Riverside Map" on a grain of rice?

And even more critically...... These Qimen formations will only be effective if they are engraved on several precious metals that are extremely pure and must be strictly proportioned together according to the requirements. In ancient times, the metal smelting technology was very backward, and if you had to rely on normal smelting methods, it was basically impossible for all metals to achieve the purity required by this formation.

In this case, either it can only be made of high-purity metals such as Tianzu gold, which are all natural, or you can only use the "water and fire quenching method" passed down by Yuan Tiangang in the book, and the ordinary metal will be continuously quenched until it can barely meet the standard, and then use it as a raw material to burn the formation.

This water-fire quenching method requires the use of many special materials, which are prepared together in a certain proportion to form a corrosive solution. Then put the metal ingots that need to be quenched into it, soak them in the solution for 7749 days, and then take out the metal ingots, put them on the fire to burn them until they are semi-melted, and hammer them continuously with a hammer.

Each time, it is hammered until the ingot has re-hardened and can no longer be hammered, then re-fired and hammered again...... In this way, it has to be hammered seven or forty-nine times before it can be considered a tempering. Immediately after that, the quenched ingots need to be soaked in a corrosive solution again, soaked for forty-nine days, and then taken out for calcination and hammering. After repeating this seven times, it is generally possible to quench this piece of metal to the standard line that barely meets the engraving formation.

After seven times, if you still want to continue refining and purifying, you can do it, but the purification effect will get worse and worse after that, and every time you quench it, the purification effect is only minimal, anyway, no matter how many times you quench it, it is unlikely that it will be purified to the level of close to Tianzu gold.

Seven times of tempering, each time had to be carried out for more than fifty days, a total of seven times, just took a year, which shows the difficulty of this alchemy. Moreover, to prepare that special water-immersed solution, there are several materials that are particularly precious in ancient times, so if it weren't for some people with family backgrounds, even if they learned this alchemy method, they wouldn't be able to play it at all!

The other thing is...... The metals required to depict the formation cannot be a single one, corresponding to different formations, and different metal proportions need to be blended together. The required metals must be of very high purity, but these very pure metals must be mixed together during the engraving.

However, in the process of carving the formation, there is a very high failure rate. Once the carving formation fails, several metals have been completely fused together, so that these metal materials that have been quenched with great difficulty are completely scrapped, and it is much more difficult to completely separate the metals that are mixed together than to re-quench several metals!

And every time he fails, not only the hard work of the past year is in vain, but the money consumed by preparing the water immersion solution seven times is also a large amount, otherwise, how could Huo Wuji's adoptive father's family get poorer and poorer, until finally so poor that even his wife and son ran away with others?

After reading the effects of the various formations in this book, Jiang Shaoyou really found that there were also formations that could prolong people's lifespan, and the level of this formation was not too high, and it was only ranked third in terms of difficulty. It's also a lot easier to make that soul chain.

It's just that the effect that this formation can produce is also very limited, even if it is all made of natural high-purity metals such as Tianzu gold, it can only extend the life of an elderly person by three to five years at most. For example, if it is only a metal purified by water and fire quenching, then even if this kind of thing is successfully made, it can extend the life of an old man by about a year, which is considered good! Moreover, this thing is still only effective for the old and frail, and if the young people wear this thing, they basically don't feel anything.

There are only eighteen basic formations recorded in this book, but sometimes only one formation is used in an alchemy work, of course...... If you carve more formations on an ornament, the more difficult it will be to make.

When Jiang Shaoyou turned to the last two pages of the book, what he saw was actually a method of making a Sumeru ring.

Because of the size of the volume, it is much more difficult to carve a formation on a ring than on a necklace or bracelet. And this Sumeru ring is to carve five formations on the same ring. It's unimaginable!

However, when Jiang Shaoyou saw the effect of the so-called "Sumeru Ring", he couldn't help but be stunned. Because the word "Sumeru" in this Sumeru precept refers to the meaning of accepting Sumeru in mustard seeds, that is, in Buddhism, it refers to the tiny mustard seeds that can hold the huge Mount Meru.

Although the description in the book is extremely brief, Jiang Shaoyou understands the meaning ...... This so-called Sumeru ring is simply a legendary storage ring!

Now that Jiang Shaoyou already has a space artifact that can theoretically expand infinitely, he naturally doesn't have much interest in the storage ring. But seeing this, he was still deeply shocked.

This time he came to the United States, originally to get the task of the two-dimensional space technology, and now this task can be said to have been overfulfilled, and the information about the two-dimensional space technology has been stored in the USB flash drive by Jiang Shaoyou.

Jiang Shaoyou also has some understanding of the two-dimensional space technology researched by the Future Science and Technology Research Institute, and knows that this technology is inspired by the analysis of the space artifact in his hand, and it is now possible to develop a closed container with an inner space that is three to five times larger than the external volume.

But now it seems that this technology has been conquered by the ancestors of China as early as the Tang Dynasty! I think that as long as you can follow the methods introduced in this book, you can make Sumeru vows after all. And since this thing is called the Sumeru Ring, even if it is impossible for the ring to really fit a big mountain, but the internal space of it will not be too small.

Otherwise, if you only calculate it proportionally, the inner space of a ring is ten times the external volume, which is not that big! I'm afraid I can't even stuff an egg into it, so can I have a hair? In fact, even if the inner space is a thousand times the outer volume, it can't hold much, so if you calculate the proportion, the space created by this thing is definitely more than a thousand times.

If you look at it according to this ratio, then the value of this Tiangang alchemy is too great!

After simply flipping through this book, Jiang Shaoyou's mood couldn't help but be excited!

If it had been before, even if Jiang Shaoyou knew the value of this book, he might not take it too seriously! After all, although the alchemy recorded in this is very magical, it is ...... It is too difficult to refine high-purity metals, and Jiang Shaoyou doesn't have so much spare work, so he goes to quench metals all year round.

But...... Before, Jiang Shaoyou had just gotten a treasure mountain from the belly of that sea monster, and there was not only high-purity gold in this treasure mountain, but also many different metal substances condensed in that treasure mountain.

Although the purity of other metals in Baoshan has not been tested, it can be guessed from the corrosive and terrifying digestive juices in the stomach pouch of the sea monster, but the purity of these metal substances should not be too low.

As long as you think about the large piece of rock on the tabletop, as soon as it fell into the stomach pouch of the sea monster, it turned into a puff of green smoke in an instant, and you can imagine that any ore swallowed by the sea monster in the stomach is unlikely to have the slightest impurity left in the digestive juice after being soaked in the digestive juice for hundreds or thousands of years!

Therefore, after owning that treasure mountain, Jiang Shaoyou wants to make any kind of alchemy works introduced in this book, it is estimated that there will be no troubles about raw materials, so that the most labor-intensive and headache-inducing step will be saved, so then Jiang Shaoyou only needs to match the proportion of various metal substances according to what is said in the book, and then carve the required formation, then ...... What alchemical work he can't get out?

Although after scanning the whole book, with Jiang Shaoyou's amazing memory, he was able to almost memorize the entire book word for word, Jiang Shaoyou still carefully included this book in the space artifact.

Then Jiang Shaoyou didn't let go of the other things in the safe, anyway, the space in the space artifact was very large, so he didn't care whether the things here were useful or not, and whether they were worth anything or not, but everything that was collected by Huo Wuji here was all given by Jiang Shaoyou to the space artifact.