After all these twists and turns, Mrs. Hua Yue suddenly felt empty, and felt that there was no point in staying here, and she was eager to refine the shell of the Xuan Turtle into a thunder-carrying spiritual weapon, so she immediately said goodbye to everyone.

With one person missing, the enthusiasm for this internal transaction has been greatly reduced, and everyone has a chance to chat about some information about the immortal cultivation world, and occasionally exchange some cultivation experiences. Chu Yun opened his eyes and felt that the trip was worthwhile.

Not long after Mrs. Hua Yue left, a red light suddenly appeared in front of Sun Zhuohang. The red light pulsed like a flame, but there was no heat.

Sun Zhuohang grabbed it casually, copied it in his hand, and stuck it on his forehead to close his eyes and ponder. In the blink of an eye, the red light dimmed dramatically, and finally disappeared into bits of crystalline light.

Sun Zhuohang opened his eyes at this time, but his eyes were full of unbelievable shock: "Fellow Daoists, I just received a summons from my subordinates, Brother Kong was seriously injured, and he fell without leaving any clues!"

"What? Although Kong Lao Er has never been married, he has already reached the peak of foundation building for decades, and he is a real fake Dan monk, with magical powers far beyond you and me. was actually hit hard and died, and he didn't even have a chance to leave the slightest clue?" Ouyang Zhao was shocked, "I'm afraid that the person who made the shot will at least have the cultivation of the Jindan period!"

The news of Kong Laoer's fall was too shocking, and the four people present were silent for a moment, and after guessing the identity of the murderer, they left here with their own intentions and went to Exchange Square.

Chu Yun had long wanted to go to the square to find out, and when he saw everyone leaving, he immediately walked towards the square in a hurry.

At this time, the sky was already completely dark, and before I knew it, half a day had flown by.

More than 100 lanterns hang over the square, and they are as bright as day. People were not affected by the sky at all, but when they saw the crowd of people, there were countless people setting up stalls, and at least there were more than 1,000 people at a glance.

Judging from the aura that these people unintentionally emitted, most of them are similar to the immortal cultivators in the Yan Relic Qi cultivation period, and occasionally there are some people with strong breaths, who are estimated to be either in the late stage of qi cultivation or have already built a foundation.

Someone sat on the ground and guarded the stall in front of them, selling all kinds of strange things.

There were also some people who didn't put anything on the table, but just put up a card in front of them with some words written on it. Chu Yun can now recognize the simple Yutang characters, and he can roughly understand that these people are buying or exchanging for certain things.

Walking along the stalls, there are strange things in your eyes. Asked all the way, some stall owners were quite friendly, patiently introducing one or two, and some stall owners were of poor quality, waving their hands to drive Chu Yun away, and they didn't bother to say a word - a mortal, what are you asking nonsense?

Chu Yun's main goal was to find an antidote to the poison of the Dark Serpent. Although it was unlikely that such an elixir would appear in such a humble stall, he had the idea of what happened, maybe there really was an immortal cultivator who was in dire need of spirit stones and sold heirlooms!

The cultivators sell a wide variety of things and styles. There are no less than dozens of styles of spiritual weapons for storage functions alone. The most common is the shape of the storage bag, and there are also various delicate shapes such as storage rings, storage bracelets, storage hairpins, storage necklaces, storage belts, etc.

"This Taoist friend is Yu Xuanang, this storage belt is the most suitable for your identity, one side of the storage volume, as long as the five spirits, good quality and low price, the opportunity can not be lost, and the loss will not come again." The stall owner was a shrewd little man, and he was quite enthusiastic and peddled to Chu Yun.

Wu Ling can buy a storage bag with a cubic volume? This price is too cheap, right? He got more than a thousand spirit stones for nothing, and in his heart, Wu Ling is indeed nothing.

In the Yan Relic, the storage bags and other cultivation materials are all kept and distributed by the clan, and there are also some spiritual weapons bought and sold in private. In Chu Yun's impression, the lowest-level spirit weapon of Yan Yi was also worth more than a hundred spirit stones.

Although the storage bag was cheap, it was a pity that Chu Yun couldn't drive it, so he had to shake his head apologetically and continue to walk forward.

Three or four hundred meters ahead, in front of it is a big strange stall, about fifty or sixty square meters, full of all kinds of incense burner-like things, some big and some small, the big one needs to be hugged by two people, but the small one is only the size of a fist.

This stall attracted a lot of immortal cultivators to watch here, and the stall owner was an old man in his fifties, who was foaming at the mouth and introducing: "Fellow Daoists, the so-called sharpening knives do not mistakenly chop wood, if you want to practice high-quality pills, alchemy technology is important, and a good Dan furnace is also essential. Think about it, if you casually find a garbage Dan furnace for alchemy, how can it withstand the high temperature and scorching for days. ”

"A furnace of precious pills is being practiced to a critical juncture," the old man stretched out his hands, and suddenly there was a 'bang' sound from his mouth, "The Dan furnace has exploded!

The old man made a gesture, which immediately caused a burst of laughter from the onlookers. He casually picked up a bronze Dan furnace in front of him and introduced: "The key to alchemy is mainly to master the heat and temperature, and this Dan furnace in the hands of the little old man is not ordinary."

Chu Yun listened to it for a while before he understood.

It turned out that for immortal cultivators, in addition to cultivating Tuna, this alchemy refiner was also a very important auxiliary.

If you want to quickly improve your cultivation, you can directly absorb the spiritual power in the spirit stone. However, this method is relatively primitive, the speed of spiritual power transformation is slow, and it takes a lot of time to expel useless miscellaneous qi. Comparatively speaking, the efficiency of taking the elixir spirit grass to improve cultivation is much higher.

However, if the elixir spirit grass is eaten raw, not only is it a great waste of medicinal power, but too many impurities are not conducive to digestion, and it is quite annoying to have constipation or something occasionally.

If you pair various herbs with dragons and tigers and refine them according to a certain pill formula, the refined pill can even exert ten times more effect than the herb itself!

There are many kinds of pills, including those that consolidate the foundation and cultivate the yuan, those that cultivate diligently, those that restore mana, those that break through bottlenecks, and those that detoxify and heal, in short, there are more than 1,000 kinds of pills.

Each elixir has a unique refining technique and herb ratio. This ratio and refining technique are generally recorded in the jade slip, which is called Danfang.

With Danfang, it is not necessarily possible to refine the pill, and it must be operated in strict accordance with the requirements of Danfang, among which the mastery of heat and temperature is particularly important.

Some pills require a very high temperature to refine, and the temperature of ordinary mortal fire simply cannot meet the requirements. So much so that many pills can only be refined if they have reached a certain level of cultivation. For example, if a Yuan Infant cultivator can only refine an elixir by spitting out infant fire, a Jindan cultivator has no possibility of refining it at all.

From the existing smelting technology in Tangzhou, it can be found that it is not easy to increase the temperature of the flame. Unless the cultivator is assisted by mana, the temperature of the flame can be greatly increased.

However, the increase in the temperature of the flame is not a simple matter, not only is it closely related to the cultivation method, but it is also limited by the cultivation realm, and there is a limit to the temperature that can be raised.

Generally speaking, alchemy can be mastered by everyone, and the cultivators of the Fire Spirit Root and the Wood Spirit Root have a unique advantage.

The fire control technique of the fire spirit root cultivator cannot be compared to the other spirit root cultivators. Because the mana contains the aura of wood, the wood spirit root can greatly enhance the mutual integration of medicinal properties.

The temperature that a cultivator in the Qi cultivation stage can raise is almost negligible, while a cultivator in the Jindan stage can increase the temperature of the flame by a thousand degrees with the supplement of Dan fire.

However, refining and refining elixir is not as simple as blindly burning at high temperatures. There is a problem of fire control involved, the temperature must keep up when the fire is needed, and the temperature must be kept constant when it needs to be roasted slowly, if the temperature is high, the pill is easy to burn.

It can be said that the main thing that the alchemy technique is about the cultivator's ability to control the temperature of the flame, and the more precise the control, the more successful it will be.

However, the flame is formless, and how can it be so easy to control?

So someone invented the alchemy furnace. The formation of the fire gathering is engraved in the furnace, which can not only increase the temperature of the furnace, but also condense the flame in a relatively closed place, which undoubtedly greatly improves the temperature control.

The alchemy furnace can not only ensure the balance of firepower, but also withstand high temperature and long-term burning, which is an indispensable tool for alchemy.

The price of the old man's Dan furnace is very expensive, three or five spirit stones are cheap, and the top Dan furnace actually costs more than a thousand spirit stones.

Chu Yun picked up a few alchemy furnaces and looked at them, then put them back in place. It's not that he is not interested in this thing, but when it comes to the fact that it is resistant to high temperatures, can burn for a long time, and coupled with the control of temperature and heat, what Dan furnace is more accurate than the reactor controlled by the younger brother 0827?

Dan furnace, reaction furnace, alchemy.

Suddenly, as if a bolt of lightning suddenly crossed Chu Yun's mind, his heart beat wildly uncontrollably.