. "Hehe, okay, okay, I'll arrange it for my junior brother!" The ugly man saw that what Han Li had given him was actually a middle-grade spirit stone, and his heart immediately burst into joy.

You must know that although it is said that one hundred low-grade spirit stones are exchanged for one middle-grade spirit stone, it is the recognized exchange rate in the immortal cultivation world. But in fact, there are very few people who are willing to exchange mid-rank spirit stones for low-rank spirit stones.

Because everyone knows that under the same circumstances, the speed at which a middle-level spirit stone can absorb the aura is much faster than that of a low-level spirit stone. With this alone, everyone wants to keep a mid-level spirit stone, and naturally they don't look down on the low-level spirit stone.

Of course, the same is true for the exchange of high-level spirit stones for middle-rank spirit stones.

After the ugly man took this fire attribute spirit stone with a smile, he became even more attentive to Han Li. He immediately led Han Li to the huge multicolored stone gate, and took out a purple arrow-shaped item from his bosom and aimed it at the stone gate for a moment.

The purple made the red light on the arrow flash, and a ray of glow flew out from it, hitting the door accurately, and immediately making the multicolored streamer turn rapidly. As a result, after a few loud "creaks" and "creaks", the stone door slowly rose, revealing a black passage behind the door. This passage is a few feet high and square in shape.

"Senior Brother, after this stone path, it's a room with a fire, let's go over now!" the ugly man said flatteringly to Han Li after squeezing out a few smiles.

"Hmm!" Han Li nodded noncommittally and walked into the passage first.

"Although this dock stone is not a rare thing, it is not an ordinary material in the world. I can find so many at once. And used it as bricks and stones to build passages and houses, which is also the ancestor of several great supernatural powers in the previous generation. It took a lot of effort to get it done. However, with the strange characteristics of the Dock Stone Ground that is resistant to high temperatures and is not afraid of the smelting of the earth's fire, this earth-fire land has never had any major accidents since it was opened!" The ugly man said with a bit of a playfulness as he led the way in front.

Han Li was very interested when he heard this. I couldn't help but touch the black stone wall on one side, and the result was slippery and cold!

"Where is this dock stone produced? It is really strange that it can resist the earth fire that is three points more powerful than the real fire. Han Li said in agreement with a rare opening and asked casually.

"Well, I heard that although it is not too rare, our Yue Kingdom really does not produce this thing, and it is all obtained by the ancestors from other countries in the extreme west, which is very troublesome!" the ugly man explained.

In this way, Han Li followed behind the ugly man, and in the blink of an eye, he passed through two other stone gates that were equally tall. Finally, he stepped out of the dockstone passage and appeared in a large rotunda.

The hall is also made of dock stone. But the diameter is forty or fifty zhang, and the height is more than ten zhang, which is really huge and shocking! Around the hall, there are white stone doors of the same size evenly distributed, and there are more than 30 rooms.

At this time, there was no one in the hall, only the ugly man and Han Li, who had just arrived.

Han Li looked at it curiously. Then I heard the ugly man grinning and saying:

"Below this hall, there is a gathering place where the local fire is most vigorous, so this gate has opened a total of thirty-six ground fire rooms for refining alchemy, and the best alchemy rooms are No. 18 and No. 19.

However, No. 18 has been occupied by a senior uncle, so the junior brother should use room No. 19! Although it is a little worse than No. 18, its firepower and stability are also excellent. The ugly man said as he led Han Li to a door painted with two golden lacquer words "Nineteen", and said with a grin.

Han Li listened without saying a word, and nodded silently in agreement.

Seeing this, the ugly man immediately took out a white jade plaque and pasted it on the door. The white stone door opened automatically. Then, the ugly man and Han Li entered the house.

The house is a square building. The area is average, only seven or eight zhang in size, but in the center of the room there is a round dun with a width of one zhang, and a fist-sized gourd is hung on each of the four walls, and there is an emerald green futon in the corner not far away.

Yuandun is also made of dock stone, and is very flat, only half a foot high. But on the outside of Yuandun, there are eight fiery red miniature dragon heads, which are lifelike. Moreover, the mouth of the dragon's head is slightly raised, which is just aimed at the sky above the center of Yuandun, and the spitting posture is very realistic.

After seeing the situation in the room clearly, Han Li was slightly surprised, but before he could ask, the ugly man had already walked to the vicinity of Yuandun and took the initiative to explain it to Han Li.

"Senior brother, this is the earth fire mouth of this house, and the earth fire needed for alchemy is spewed out from these eight dragon heads. And according to the need, the size and height of the flame can also be adjusted by itself, and the specific driving method is engraved on the outer wall of the stone pier. The ugly man pointed to Yuandun's explanation.

But then he pointed to the four gourds on the wall and said:

"These gourds are filled with Martian sand, but

Strengthen the power of the earth fire, if the junior brother feels that the temperature of the earth fire is not enough, increase the power, but it will not last too long. In addition, this jade card is put away by the junior disciple himself. As soon as the door was closed, it was cut off from the outside world. Unless it is the joint efforts of several monks of the Yudan period, no one can enter from the outside, so although the junior disciple can rest assured, no one will disturb him!"

Hearing this, Han Li secretly rejoiced in his heart, such a completely closed environment was exactly what he needed, and his face couldn't help but show a little joy!

At this time, the ugly man saw that the explanation was almost over, so he said goodbye and left.

Han Li saw the ugly man out of the house, and immediately drove the jade plate to seal the stone gate again. Then he walked up to Yuandun excitedly, and after circling around it several times, he carefully looked at the eight spitting dragon heads.

In the past few years, Han Li had deliberately spent a lot of time studying the alchemy technique in order to refine the Zhuji Pill this time. Therefore, he is not unfamiliar with the way of alchemy. Knowing the success of the pill mainly lies in the control of the heat during alchemy, and the grasp of the time to open the furnace to take the pill.

As for the amount and quantity of raw materials put in, after countless practices of the ancestors, it has already been clear in the formula, so there is no need to consider it. Of course, it is okay to increase or decrease the number of Cheng Dan at one time. As long as the number of raw materials is increased or decreased in a fixed proportion, the same amount can be increased.

But when it comes to simplicity, it's hard to do!

Accurately controlling the heat of the Dan furnace and grasping the opening time of the furnace are these two major problems that have stumped many so-called alchemy masters.

Even the most famous alchemy masters in the world had to admit that even if they took action in person, the probability of being able to become a pill would not be too high, only about half, and this was still the best elixir for refining them. So let alone other ordinary alchemists!

Therefore, whether the pill can be successfully refined depends on whether the alchemist has rich experience. The more alchemists who have alchemized more times, the greater their chances of becoming a pill. Therefore, alchemists are the two most money-burning professions in the immortal cultivation world on a par with talismans, and of course, they are also the two most popular professions.

Han Li also inquired about these things very clearly, knowing that with himself, a rookie, it was purely a dream to be able to refine the Tsukidan in one fell swoop. So he planned it from the beginning, preparing to refine Tsukidan one by one!

In this way, even if he failed more times before, he would not be too heartbroken. And the amount of elixir he prepared was enough to refine more than a hundred times, and I believe that so many raw materials were enough for him to accumulate experience in front of him.

Han Li, who had made up his mind, wrote down the method of driving the dragon head. Then he pinched the method with his hand, and shot out eight red lights on the dragon's head in a row, and the dragon's head immediately absorbed the red light, and then the dragon's mouth opened slightly, and they spewed out purple flames with the thickness of chopsticks. Suddenly, the air inside the room was filled with a scorching heat, which made Han Li secretly surprised.

Afterwards, Han Li tried to change the thickness of the flames, as well as the height of the dragon's head spray, and other subtle operations, until he was able to manipulate it freely, and then extinguished the dragon's head's ground fire. Then he went to the futon and crossed his knees to recuperate.

Han Li had been sitting for most of the day, and after realizing that his mental and physical strength were all in the best condition, he opened his eyes and stood up, ready to start alchemy. However, fortunately, after Han Ligong's method passed the tenth layer, he could already open up the valley, so there was no need to eat.

Now, Han Li first took out the silver silk tripod he had bought that day from his storage bag and injected a levitation technique on it, causing it to stop directly above Yuandun out of thin air. This spell was also specially cultivated by Han Li for today's matter, and it took a lot of time to break it.

Han Li once again shot a red light at the dragon's head, releasing the purple earth fire in the dragon's head.

Because the raw materials had not yet been put into the ding, Han Li controlled the earth fire and made it very small, only as thick as a silk thread. Then let the silver silk tripod start to rotate slowly out of thin air under the preheating of the eight fire lines.

After a quarter of an hour, the silver silk tripod was already hot, exuding an astonishing heat.

Seeing this, Han Li pointed at the small tripod, and as a result, the lid of the silver silk tripod immediately flew up, revealing the mouth of the tripod. With a look of his right hand, a white jade bottle appeared in his hand, and the bottle contained a precise amount of elixir powder prepared.

Controlling the vial, Han Li poured all the medicinal powder in the vial into the silver silk ding, then immediately threw the bottle away, then took out another bottle from the storage bag, and continued to repeat the same action.

In this way, Han Li poured all the dozens of elixir powders he needed into the silver silk tripod, and finally closed the lid again. The first step was finally completed, and it seemed perfect and nothing went wrong.