A dazzling light lit up from the magic circle, and the next moment, the light disappeared, and Lu Wenming's figure disappeared from the magic circle.

"You're in advance!" Ma Gao said to Sun Yun.

After listening to Ma Gao's words, Sun Yunhao walked into the circle and stood in the middle. Sun Yunhao only felt a flower in front of him, his eyes closed, and when he opened it again, he had already appeared on an endless stone path. And Lu Wenming was standing not far from him.

Lu Wenming didn't care about Sun Yunhao, but continued to look at the teleportation array.

Not long after, Ma Gao and Fang Fu were also teleported in.

"These two teleportation arrays are two-way, and if you want to leave here, you can only go from here." Lu Wenming said, took out three storage bags from his arms, handed them to Sun Yunhao and the others, and said: "These three jade plates are all written on the things that entered the refining room, the number of the refining room is written on them, and the method of how to use them is written on the back, it is very simple, you can see for yourself." Once you enter this refining room, no one will disturb you. Each refining room was wrapped in a huge forbidden formation. Unless there was that jade dish, it would be difficult for even the monks to break in. There are twenty catties of refined copper ore here, and after a month, Uncle Kuang will inspect you here, so you can do it yourself. ”

After saying this, Lu Wenming nodded at the two guards, and walked into the magic circle, and with a flash of white light, the person disappeared.

"Brother Sun, Brother Fang, then I'll leave first." Ma Gao said as he walked inside, looking around from time to time.

Sun Yunhao and Fang Fu said hello and turned to leave.

On both sides of this stone corridor are houses built of unknown stones, and in such a hot weather, there is a faint feeling of coldness when you touch it. Sun Yunhao raised his head and looked at the plaque in the first room, which read the words "four or five", while the plaque on the opposite side read the word "one zero". He walked a little more and found that the numbers "sixty-two" and "two-eight" were lined on both sides of the road, and there was no pattern at all! Sun Yunhao muttered to himself. It seemed that he could only walk through room by room.

After walking around seventy or eighty rooms, they finally found a room called "One, Two, Five."

Sun Yunhao picked up the jade plaque and looked at it again, the exercises recorded on it were indeed very simple, Sun Yunhao only looked at it twice, and then felt that he had been able to completely master it.

He placed the jade plaque in a circular groove on the stone door, looked at it, and saw that it was indeed just the right size for himself, and then with a word in his mouth, he stretched out a finger and slapped it at the jade plaque. The blue light on the jade plate flashed, and after a while, the stone door made a "squeak" sound, revealing a hole about five feet in diameter. Sun Yunhao took the jade card, walked quickly to the stone gate, and played a magic decision again. With a "bang", the stone door closed again, closed again.

Then, Sun Yunhao began to look at this refining room.

This stone room is not too big, about ten zhang square, and the four walls, even the floor, are made of the same kind of material. On the two walls of one south and one north, two dragon heads are carved respectively, with a large mouth of blood basin open, engraved with the four big characters of "fire of the earth and lungs". And in the west of the stone room, there is an identical dragon head, the dragon head is engraved with the four big characters of "spiritual spring water", and under the dragon head, there is a pool made of cyan rock.

It seems that these earth fires and spiritual springs are obtained from these dragon heads.

Other than that, there was nothing in this refining room.

Sun Yunhao completely released his divine thoughts, and after carefully probing in this stone house, and confirming that there were no traps, he sat down. Sun Yunhao did not rush to study the jade slip given by Uncle Kuang, but took out a small tripod that he had not seen for a long time from the storage bag, and after stuffing a pill of marrow washing into it, he grabbed a blue glittering top-grade water spirit stone in each hand, sat cross-legged, closed his eyes and recuperated.

In the next month or so, Sun Yunhao barely left the refining room.

He is still only an immortal cultivator in the Qi refining period, and he has not yet reached the point of building a foundation and cultivating immortals to "Bigu", so he naturally needs to eat something to maintain his life. However, Sun Yunhao had already purchased a large number of "Bigu Dan" in Jile Fang City to fill his stomach.

"Bigu Dan", after taking it, people don't have to eat anything for a month. This is a luxurious elixir, unless it is at a critical moment, and it is necessary to meditate and pranayama, no one will be willing to take one. They would rather have a meal on three or five days than spend five lower-grade spirit stones a month to buy a Bigu Dan.

But the last thing Sun Yunhao lacked was spirit stones, so he secretly bought them a few times, enough for him to eat for a few years.

During this time, Sun Yunhao's life can be described as busy.

In the first half a month, Sun Yunhao used that little tripod to improve the quality of several spirit pills by one level, swallowed them, and began to retreat and cultivate. It is worthy of being the best place to refine weapons, without any noise, which makes people feel refreshed. In his spare time, Sun Yunhao also began to study the alchemy technique taught to him by Uncle Kuang.

Half a month later, when he refined this batch of refined copper ore, he found that it was only twenty catties.

Purification, sure enough, is a very tiring thing!

He had to consume a lot of spiritual power to refine these ores little by little, and then use his powerful divine sense to control the strength of the flames, and then extract all the impurities in these ores, and finally collect these ores. Then use the spiritual spring water to quickly cool down, and a small piece of refined refined copper can be obtained.

In this process, the loss of spiritual power aside, Sun Yunhao has endless high-grade spirit stones on his body, but he is not afraid. But such a long period of consumption is also a big burden for him.

He didn't have any elixir on him that could restore his divine thoughts, and only by meditating and pranayama could he slowly recover his divine thoughts.

But now, he simply didn't have enough time to refine, and at the end of the day, he also refined a fist-sized piece of refined iron, twenty catties of refined iron, and there was no ten days and half a month, so there was not enough time for him to rest.

In this way, Sun Yunhao refined it three times in a row, because his divine sense was not enough, and the speed of control was a little slower, so the copper block he refined burned in the earth fire for a little longer, not only the color was a little darker, but even the aura was greatly reduced. Obviously, these copper essences are the result of refining failures.