Alchemy is the first of the four arts of cultivation, and its importance to monks is needless to say, no one's cultivation can be separated from the elixir. However, the knowledge of alchemy is too broad and profound, and ordinary monks can only stay in the primary stage throughout their lives, and every alchemy master in this world is a guest of any sect or family.

Although Cao Qianhe is now a cultivator in the early stage of the Dao Seed, his alchemy is only in the primary stage, and he can only refine second-order pills, and if he wants to go further, he doesn't know how difficult it is. It not only requires the talent of alchemy, but also requires long-term practice and accumulation.

On the "Heavenly Dao Elixir Record", there are more than 100,000 kinds of herbs and plants, not to mention the rest of the animals, minerals, and the total number of strange things that can be used in medicine is nearly a million, and it is difficult for anyone to be able to write them all down and know them all.

And the more important point of the Dan Master is to collect the Dan Fang, there are too many varieties of herbs in the world, because their medicinal properties are different, so it is impossible to randomly find a few medicinal materials together to refine the Dan. You can't become a Dan like that, and even if you are lucky enough to become a Dan, it is estimated that you can't eat what you refine.

Only those effective pills that have been tested by countless predecessors are useful pills, but at present, except for the dozens of pills provided by the Heavenly Dao Sect for free that are circulating on the market, the rest of the pills are all collected by the pill masters, and no one will provide them for free without paying a certain price.

For Danshi, what is indispensable is the different fire, alchemy requires fire, some first-order pills can also be replaced by earth fire in the leyline, but the second-order and above pills must use different fire to refine. The higher the quality of the fire, the higher the chance of becoming a pill.

There are countless varieties of different fires in the world, which can be roughly divided into four levels of heaven and earth Xuanhuang, and each level can be divided into upper, middle and lower grades, like Cao Qianhe, there are only two yellow-level medium-grade different fires in his hand, one is called Xingjiyan, and the other is called Longwenyan, Xingjiyan is suitable for alchemy, generally the pills below the third order can be used, if the Xingji Flame evolves into the Xuan-level Xingji Flame, then the fifth-order pills below can be refined using the Star Pole Flame.

As for the dragon pattern flame, it is suitable for refining weapons, generally speaking, the different fires suitable for alchemy are relatively docile, while the different fires suitable for refining weapons are relatively fierce. Of course, there are countless varieties of different fires in the world, but there are not many different fires that are really suitable for alchemy refiners, and more of them are used by monks to cultivate supernatural spells, especially for monks in the Dao Fruit Realm, cultivating fire supernatural powers, must be indispensable for high-level exotic fires.

Of course, the most important instrument of alchemy is still Danding, Danding is also a kind of magic weapon, and it is the most valuable magic weapon, "Heavenly Dao Magic Instrument Spectrum" does not include Danding in it, but a separate volume of "Heavenly Dao Danding Record", because the level division of Danding is different from magic weapons, it is only divided into four levels: lower grade, middle grade, upper grade and best grade, and the lower grade Danding is equivalent to the low-level upper grade magic weapon. Cao Qianhe's Danding is called Biyan Qingxu Ding, which is a medium-grade Danding, and the market price of this Danding is more than 200,000 spirit stones, and most of them are still priceless, and it is extremely difficult to obtain.

The reason why the value of the Danding is so high is because the refiner casts a Danding, which requires countless valuable materials and energy, and at the same time, it is necessary to depict no less than five miniature formations inside the Danding, such as the Gathering Spirit Array, the Spirit Transformation Array, the Dust Removal Array, the Yin and Yang Reversal Array, the Bafang Convergence Array, and so on are all necessary formations for casting the Danding.

Cao Qianhe roughly explained to Li Dong the role of these formations in the Danding, for example, the Gathering Spirit Array gathers the spiritual energy of heaven and earth inside and outside the Danding, and it is difficult to support the alchemy time by the monk's own vitality, because the general alchemy time is not short, as short as three or five days, and as long as ten days and a half months to produce a furnace of pills, no one's vitality can continue to support for so long. This requires extracting the aura of heaven and earth from the outside world, and the spirit gathering array is to gather the aura of heaven and earth, and the spirit array is used to decompose and refine the aura in the spirit stone when the aura of heaven and earth in the outside world is insufficient, but the consumption of spirit stones may be a little large.

According to Li Dong's understanding, this is equivalent to a car that burns solar energy, when the solar energy in the outside world is sufficient, the car can run, and if the solar energy is insufficient, then burning gasoline can also run.

The dust removal array is to extract the waste dust in Danding, which is equivalent to the function of range hood and vacuum cleaner.

The Yin and Yang Reversal Array is a formation that converts the Yin and Yang attributes in the Danding into each other, which is probably equivalent to the positive and negative poles of the power supply.

The Bafang Aiqi Array is a formation that controls the distribution of the aura of various herbs in the Danding, because each pill is synthesized from several or dozens of herbs and herbs, and each medicinal herb is not the same to maintain the best medicinal spirituality, which requires a free control of the distribution of the aura inside the Dan furnace, which is equivalent to an intelligent automatic control system of aura.

The first step of alchemy is the purification of medicinal herbs, any herb contains impurities, and purification is to remove these impurities, leaving pure medicinal properties. Some herbs even have multiple attributes, and when purifying, it is necessary to remove the unwanted attributes of the herbs, leaving one or several attributes required for alchemy, so the purification technology is also crucial.

The purity of general medicinal materials is considered qualified when the purity reaches eighty, and it can be used in medicine. Of course, the higher the purity of the herbs, the better the quality of Cheng Dan.

However, generally when the Dan master is alchemy, he will invite some handymen to do the work of purification, such as Sun Cheng and his wife are working in the Huang family's Dan Workshop, helping the Dan master to help, mainly to do the work of purifying medicinal materials.

After some explanation by the master, Li Dong's head was a little big, this alchemy is really not easy to master, no wonder the pills on the market are so expensive, fortunately, the master did not ask him to master the alchemy immediately, but just let him memorize the "Heavenly Dao Elixir Record" first, and passed on to him the method of purifying medicinal materials, so that he could practice the purification of medicinal materials first.

As the name suggests, the purification technique passed on by Cao Qianhe to Li Dong is called "Transferring Qi and Dividing Spirits", which is to remove excess miscellaneous qi from medicinal materials and separate and purify the spirituality of medicinal materials. Qi and spirit transfer is the most widely spread purification method in Canglan Star.

The first medicinal herb that Li Dong began to purify was the silver scale grass picked in the master's medicine garden, the silver scale grass was named after the golden horn and silver scale snake, which is the main food of the golden horn and silver scale snake, and the shape is somewhat similar to the dandelion on the earth, but it is not green, but silvery-white, this silver scale grass can be used to refine the first-order pill Qi Condensing Pill, which is one of the most common of the six medicinal materials used to refine the Qi Condensing Pill.

Li Dong used ten years of silver scale grass, those thirty years old, fifty years old, the master did not let him move for the time being, that can only be used when he officially opens the furnace for alchemy. The past ten years are just for him to practice. Ten years of silver scale grass is not enough to qualify for medicine, and it takes at least thirty years to be eligible for medicine.

Li Dong held a ten-year-old silver scale grass in his hand, and his spiritual sense was released, and he carefully sensed this silver scale grass, in it, Li Dong felt the three attributes of wood, fire, and earth, and sure enough, it was the same as said in the "Heavenly Dao Elixir Record", the silver scale grass was a three-attribute medicinal herb, however, Li Dong only needed its wood attribute, and the fire and earth attributes in the silver scale grass must be removed.

When Li Dong played a few tricks according to the "Qi Shifting Spirit Technique", he could clearly sense the fire of the Silver Scale Grass, and the earth attribute began to become active, like two naughty children locked in the small black room, there was a strong urge to escape from the black room. After Li Dong mobilized the fire and earth veins in his body, he easily seduced these two naughty children. Li Dong could even feel that the vitality in his earth fire path veins had increased slightly, although it was only an insignificant trace, but the fact that refining medicinal herbs could actually increase cultivation didn't seem to have heard from the master?

Subsequently, Li Dong refined and purified the remaining wood spiritual qi according to the technique of transferring qi and separating spirits. It wasn't until his spiritual sense sensed that the silver scale grass in his hand was left with a rich wood attribute aura.

Succeeded so easily? It's not that hard!

Li Dong was very proud and handed over the purified silver scale grass to the master for inspection.

Cao Qianhe took the silver scale grass purified by Li Dong, and was a little surprised, the purity was more than ninety percent five, almost comparable to the effect of his personal purification. This apprentice is too perceptive, right? He only taught it once, and the apprentice easily succeeded in refining a silver scale grass. He remembered that he seemed to have failed more than a dozen times before he succeeded, and the purity of the first purification was only eighty percent.

Could it be that the five yin, five yang, and ten perfect spiritual veins are really so powerful? I'm afraid that it won't be long before he has nothing to teach his apprentices, and it is only a matter of time before he is surpassed.

Cao Qianhe was very satisfied with the performance of his apprentice, since Li Dong had already learned the purification technique, Cao Qianhe asked Li Dong to familiarize himself with the "Heavenly Dao Elixir Record" first, and then teach him alchemy tomorrow.

Li Dong was in a good mood, and suddenly found that alchemy didn't seem to be as difficult as he imagined, as long as he learned alchemy, he could refine the pills and sell them by himself in the future, or it wouldn't be long before he could earn a large amount of spirit stones, whether it was to support Uncle Sun's family or his three younger brothers, the three brothers and sisters of the Song family should be no problem, so as long as he can earn spirit stones and continue to cultivate, he will definitely become stronger and stronger, and his dream of going home will get closer and closer. The future is really promising!

Just when Li Dong was secretly complacent, a voice came to mind in his mind.

"Stupid boy, how can there be someone like you who purifies medicinal materials, doesn't that ruin all the aura in the elixir? Do you know how difficult it is for elixirs to absorb aura? Removed like that? It's too tyrannical! ”

The one who spoke was actually the little cutie of the machine spirit who was sleeping in his spiritual platform and had not made a sound for a long time.