Although Ran Qixi's cultivation is only a great consummation of qi training, the imperial envoy is a high-grade flying spirit weapon, and the speed is not slow, and he crossed several mountains without the kung fu of a small half-pillar of incense, and arrived in front of a low mountain.

"Uncle Han, it's time for Uncle Xu's cave!" Ran Qixi controlled the flying boat to land on a stone platform halfway up the low mountain, walked to Han Ming's side, and said softly.

Han Ming nodded slightly, stood up, jumped up from the flying boat, landed lightly on the stone platform, and walked straight towards a stone wall on the other side of the stone platform.

There is a thin layer of magic circle light curtain outside the stone wall, revealing a scorching aura, and the spiritual light is flowing non-stop, at first glance it is not a simple magic circle, at least it can temporarily block the magic circle of the monks in the foundation building period.

Han Ming hit a red transmission note at the stone wall, then stood with his hands tied, waiting quietly.

However, after ten breaths, a crack opened in the stone wall behind the light curtain, and it became bigger and bigger, separating towards both sides, until it expanded to a small half zhang before slowly stopping, and out of it came a small Taoist boy with red lips and white teeth.

Xiao Daotong glanced around, saw Han Ming at a glance, and immediately stepped forward to bow to Han Ming: "It's Uncle Han, my master is bathing and fasting, and I can't receive Uncle Han in person for the time being, but I have specially instructed before, if Uncle Han comes, take Uncle Han to the Dan Room first, Uncle Shi is here, please!"

"Okay, lead the way!" Han Ming nodded, then raised his feet and followed the little dao boy towards the back of the stone wall.

After taking a turn in Xu Changlin's Cave Mansion, Han Ming found that the concentration of aura in Xu Changlin's Cave Mansion was a small level higher than that of his Cave Mansion, and the space was also very large, more than three times that of his Cave Mansion.

The two caves are not at the same level at all!

Thinking about it slightly, Han Ming also understood, Xu Changlin was an alchemy master, and he could refine the pills of the foundation building period, and in the pill-based Dan Sect, the status and treatment were naturally higher than that of ordinary foundation building period monks.

Han Ming didn't envy this cave mansion very much, because his cultivation now mainly relied on pills to improve, and he didn't have any harsh requirements for the cultivation environment, and the aura richness of his previous cave mansion was far more than here, whether it was the Ascending Star Sect Library Pavilion, or the underwater cave mansion on the edge of the boundless black sea, he had a better one, so naturally he couldn't look down on Xu Changlin's cave mansion!

After the little Taoist boy led Han Ming into a small stone room, he withdrew from the stone room, leaving Han Ming alone in the stone room, Han Ming was not seen, and walked around directly, and at the same time, his spiritual power explored the surroundings, wanting to see what was special about Xu Changlin, the alchemy master's alchemy room.

There is a large brass furnace in the middle of the stone chamber, two zhang wide, four or five zhang high, the upper end of the Dan furnace is close to the top of the stone chamber, the lower end is melted in the stone slab, there are dozens of hundreds of brass pipes towards the underground eyes.

The whole brass furnace looks like it grows out of the ground!

A hint of discoloration flashed on Han Ming's face, and his spiritual power immediately extended towards the surrounding stone walls, and after some searching, he found nine brass dragon heads on the stone walls, extending from the stone walls, and the dragon heads were facing the brass furnace in the center of the stone room.

"Could this be the Nine Dragons Earth Furnace!" Han Ming muttered to himself, his tone full of shock.

"Senior Brother Han looks down on Senior Brother, that Nine Dragons Earth Fire Furnace is the treasure of this sect, it has always been placed in the Earth Fire Pavilion, and it is under the control of Senior Uncle, how can it appear in Senior Brother's alchemy room! This is just an imitation of that Nine Dragons Earth Fire Furnace, and it is not the only one, there are more than ten pieces in this sect!" With a clear laugh, Xu Changlin, who was dressed in a white robe, walked in from outside the stone room.

"It's just an imitation, but looking at the heavy aura of this imitation, I'm afraid it is definitely not worse than the effect of the top-grade alchemy furnace, even if it is not much worse than the top-grade Dan furnace, Senior Brother Xu is lucky, there is a good treasure, which makes the junior brother envious for a while!" Han Ming turned around, faced Xu Changlin, and arched his hand with a smile, with a hint of envy in his tone.

"Senior brother smiled, it's just a Dan furnace, it's not worth mentioning!" Although Xu Changlin shook his head, there was a smug smile on his face, it was obvious that this Dan furnace was not as worthless as he said, but should be quite precious!

"I have just fasted, Senior Brother is in a good state at this time, so I won't say anything, so I will hurry up the alchemy, Senior Brother Han is watching from the sidelines, if you have any doubts, write them down, and when the alchemy is over, Senior Brother will definitely explain in detail!" Xu Changlin finished speaking, didn't say anything, and walked straight towards the alchemy furnace.

Xu Changlin sat cross-legged on a stone platform in front of the brass pill furnace, looked the brass pill furnace up and down, closed his eyes and breathed, but he was not in a hurry to alchemy.

Although Han Ming had never refined the pill, he also knew that alchemy was a delicate matter, and the slightest disturbance could lead to a failure, so he stopped talking, for fear of disturbing Xu Changlin's alchemy.

Han Ming walked to a corner of the wall, making sure that this place would not disturb Xu Changlin's alchemy, and then slowly sat down, motionless, like an old monk in a meditation, not making a sound at all.

"Whew!" A quarter of an hour later, Xu Changlin took a long breath and began to take out pieces of spirit bones from the storage bag on his waist, lined them up.

The shapes and colors of these spirit bones are different, exuding a variety of breaths, but the only thing in common is that they are all crystal clear, as if they were carved from jade.

These spirit bones are not side objects, they are the kind of spirit bones that Han Ming collected in the Ten Thousand Skulls Cave before, it is a special bone that gathers most of the essence of the spirit bones in one place, and its effect is quite similar to the demon pill of the demon beast, but the demon beast will only produce the demon pill when it reaches the stage of knotting, and the essence of the spirit of the spirit bone is otherwise, almost all the bones above the foundation building period will produce the essence of the bones of the bones, and some of the bones of the bones in the Qi training period may also produce some essence of the bones in advance because of mutations.

Xu Changlin raised his head and glanced around, then pinched the magic trick, and made a big spell towards a brass fire dragon on the stone wall, and at the same time used the object control technique to control the largest piece of the spirit of the dark bone in front of him, so that it was quietly suspended in mid-air.

As soon as the magic trick was entered, the brass dragon seemed to come to life, shaking its head and tail, opening its mouth wide, and spewing out bursts of hot strange wind, and at the same time the dragon's mouth made a gurgling sound, just like a blacksmith in a mundane blacksmith pulling a bellows to blow fire.

"Disease!" Xu Changlin snorted, and at the same time, the magic method changed slightly, and he controlled the essence of the dark bone into the hot wind.

"Whew!" The dragon's voice grew louder and louder, and the hot air it spewed began to change from transparent to red, and every now and then a grain of sparks would flash away in the hot wind.

"Fire!" Xu Changlin looked at the dragon head a little farther away, and the fire dragon suddenly groaned, and the wide dragon mouth suddenly closed, and then bulged greatly, as if something was brewing inside!

After five or six breaths, the dragon's mouth suddenly opened, and a red flame erupted from it, like a small red dragon churning out, extending straight to the front of the spirit of the bone.

"Burn!" Xu Changlin looked at the red fire dragon a little farther away, and the fire dragon immediately formed a spiral, winding around the piece of spirit of the bone, and it burned fiercely.

Feeling that the essence of the dark bone melted at a speed visible to the naked eye, Han Ming had a new understanding of the earth fire furnace in his heart, this earth fire was so pure, it was three points purer than the innate true fire in the foundation building period, and it seemed to have undergone special treatment, which faintly revealed the breath of wood attributes, which made the dryness of the earth fire go to ninety percent, which was more "soft" than the innate true fire, and it was the best flame of alchemy!

"I'm afraid the overall effect of this furnace imitation is not much worse than the top Dan furnace, and using this kind of Dan furnace to refine the Dan is afraid that it will get twice the result with half the effort!" Han Ming muttered to himself silently, with a burst of envy in his heart.

Although the Dan furnace given by Ran Qixi is also a high-grade Dan furnace, the material of the Dan furnace alone should not be much worse than the earth furnace, but the earth furnace occupies a favorable location, and with the help of the treated earth fire, it has a great advantage in terms of flames, not Han Ming's Dan furnace can be compared!

Han Ming shook his head slightly, leaving all the envy in his heart behind, and continued to perceive Xu Changlin's alchemy, anyway, he hadn't started alchemy yet, and no matter how good the Dan furnace was for him, it wouldn't be of much use!

Under the refining of the pure earth fire, it only took about half a pillar of incense, and the essence of the dark bone turned into a large mass of dark cyan liquid, like a large ball of **, quietly floating in the air.

"Hurry!" Xu Changlin skillfully waved one hand, and another brass dragon head on the stone wall shook its head and shook its tail, spewing out bursts of hot wind, and it didn't take long for another red flame to erupt from the dragon's mouth, burning the dark cyan "bone" together with the previous flames.

Xu Changlin's spiritual power pulled a line of fire the thickness of a silver needle, shuttling through the large mass of dark cyan liquid, and continuously removing the impurities in it with the help of the power of flames.

After refining for three or four quarters of an hour, Xu Changlin breathed a sigh of relief, and with a wave of his hand, he withdrew the flames, revealing a fist-sized mass of liquid inside.

The liquid was no longer dark cyan, but emerald and crystal clear, and the surrounding firelight was thrown into it, and then refracted into a large cyan light, scattering around the stone chamber, making the entire stone chamber seem to be in a kind of dream.

Xu Changlin took out a small bone bottle and put this liquid into it, so that the verdant dream scene in the stone room disappeared!

Breathing a sigh of relief, Xu Changlin used one hand to stimulate the two dragon heads again, and used the earth fire to refine and purify the next piece of the essence of the dark bone.

Five or six hours passed in a blink of an eye, and Xu Changlin finally purified all the essence of the dark bones that he needed.

Xu Changlin did not rush to alchemy, but continued to meditate and breathe, as if he wanted to return his state to the best state.

Han Ming rubbed his temples with both hands, let out a breath gently, and began to breathe quietly, throughout the process of refining the essence of the dark bones, he has been highly concentrated with mental power, without a moment of wandering, when it comes to the consumption of spiritual power, he is not less than Xu Changlin at all!