The master of Yuqing Temple and the head of Xuandu Sect is a middle-aged man wearing a white robe and with an elegant demeanor.

If he had not known his identity long ago, Luo Yan would probably have immediately thought of him as some kind of great scholar, an important official of the imperial court, or a local prefect.

"Sit down." Master Xuandu said kindly.

Luo Yan sat down on the cushion respectfully.

"You major in the art of formation?" Xuandu Sect Master asked gently, "I heard from Elder Shi Ding that you have been promoted to the Huafu level."

"My reply is to the Master." Luo Yan said solemnly, "I am indeed a master of formations. I was fortunate to be promoted to the marrow cleansing stage during the trip to the Li Palace, and I also had a fortuitous encounter on the Sanyu Treasure Ship and entered the Huafu."

"You don't need to add 'reply to the master' before you speak." The head of Xuandu laughed and looked at his son Tian Zhang who was standing beside him. "Luo Yan is cautious and polite, and you are lazy and rude. When will you be able to learn his thoughtfulness and courtesy?"

Tian Zhang immediately understood the meaning of the string music and said with a smile:

"I must study hard with Junior Brother Luo."

Luo Yan smiled, knowing that this was Master Xuan Du trying to get close to him.

Since my son cannot marry Shi Liuli, it would be good for him to interact more with Luo Yan.

"Have you encountered any difficulties recently?" Master Xuandu continued to ask.

Luo Yan thought that the highlight was coming, and this was going to benefit me! He said with embarrassment:

"There are no other difficulties, but my life span is too short and I am afraid it will be difficult to upgrade my Dan rank."

When Xuandu Sect Master He Tianzhang heard this, it seemed very reasonable:

Luo Yan entered the sect at the age of 20. Within ten years, he had a series of adventures and jumped into the Huafu stage. His speed could not be faster.

If you calculate carefully, when you are 190 years old, you can still practice for 160 years, and you are only 40 years away from forming a top-grade golden elixir.

If you are just one step away from success but cannot take it due to lack of opportunity, who would be willing to accept this?

After a long silence, Master Xuandu said slowly:

"The temple has always given priority support to outstanding disciples. A few days ago, we had a surplus of about three spoonfuls of gold-mercury elixir from the trade with Shushan."

Luo Yan almost vomited blood when he heard this: I have already drunk the gold-mercury elixir!

Seeing that Luo Yan did not respond, Tian Zhang thought that he did not know what it was, so he explained:

"This golden mercury elixir is a famous and precious elixir of the ancient human race. One spoonful is probably equivalent to sixty years of Huafu cultivation."

"The preparation of this medicine is extremely complicated. It requires a variety of rare minerals, spiritual medicines, and even materials from monsters. Therefore, in the past, Shushan provided the raw materials, and we were responsible for refining, and finally shared the output equally."

"So that's how it is." Luo Yan could only force a smile.

Seeing that the joy on his face was rather perfunctory, Master Xuandu could see the clue and thought to himself, this young man... could it be that he has already drunk?

Well, Tiangongfang has a wide network of contacts, so it is not surprising to say that Elder Shiding has obtained gold-mercury elixir for him.

"In addition to the Gold Mercury Danhua Liquid," Master Xuandu continued with a smile, "there is also the Five Qis Chao Yuan Cave to choose from."

"The Five Qis Converging to the Origin Cave?" Luo Yan asked curiously.

"It is a cave located overseas." Tian Zhang explained, "The exact location needs to be kept secret. It is currently only in the hands of our Yuqing Temple."

"There is a Chaoyuan Qi channel deep in the cave. Breathing on it can absorb Chaoyuan spiritual energy, which has the miraculous effect of replenishing deficiencies."

Chaoyuan Spiritual Energy? Luo Yan immediately began to ponder in his memory.

The so-called Chaoyuan spiritual energy should be the unique spiritual energy at the end of the dragon vein.

The dragon vein of the Shenzhou continent faces east and west, with its head originating from the Kunlun Mountains and its tail ending in the depths of the East China Sea.

The spiritual energy produced at the end of the dragon vein is called "Chaoyuan spiritual energy". According to historical records, it is in line with the five elements of the acquired nature, and has the effect of "putting one at death and then giving birth to him", filling in the gaps. It can revive the dead, make bones flesh, make old women give birth, and make dead trees sprout. It is the rarest wonder in the world.

Transforming the flawed Purple Palace into the Jade Palace is naturally within the scope of "filling in the gaps".

The only problem is that this thing is so rare that there are only a few books recording it. If Luo Yan wasn't so knowledgeable, he might not have remembered it.

"If that's the case," he carefully considered his words and asked, "Why have you never heard of it in the temple?"

"Because the Five Qis Converging to the Origin Cave is extremely dangerous, few people have set foot in it, so naturally not many people know about it." Xuandu Sect Master said sternly, "Yuqing Temple can allow you to explore it, but there are many risks involved. Elder Shiding needs to explain it to you before you decide whether to go."

Luo Yan said goodbye to Master Xuan Du and returned to Tiangong Workshop with heavy hearts. He saw Shi Liuli talking with Elder Shi Ding.

"...In short, during the time in Guixu, it was all thanks to me that I took care of my junior brother!" Miss Shi puffed out her chest, as proud as a peacock, "I also learned my cooking skills during that time."

"Okay, okay." Elder Shi Ding was almost tamed into a yes-man who only knew how to praise. He turned to look at Luo Yan who had returned and asked, "What's the matter?"

"That's right." Luo Yan glanced at Miss Shi and asked, "Master, have you ever heard of the 'Five Qis Converging to the Origin Cave'?"

"The master told you that?" Elder Shi Ding frowned. "That's not a good place."

"What is the Five Qis Converging to the Origin Cave?" Shi Liuli asked curiously.

"This cave is located deep under the sea, and it is winding and far-reaching." Elder Shi Ding explained, "Nine out of ten ordinary cultivators who enter it will never return."

"More than 90% damage rate?" Luo Yan smacked his lips and said, "It's so dangerous, is there any demon inside?"

"That's not the case." Elder Shi Ding sighed, "It's just that it's tortuous and long. Moreover, the magnetic field inside is disordered, and most of the path-finding magic tools will become ineffective, causing many cultivators to lose their direction after entering and become trapped inside and unable to get out."

"How deep is the cave?" Shi Liuli asked curiously.

"If converted into distance, it is at least more than 10,000 miles." Elder Shi Ding replied.

Luo Yan's heart was shocked: Ten thousand miles? The radius of the earth before the time travel was only twelve thousand miles... But here we are talking about the effective length of the cave, not a straight line, so it can be considered an extremely deep sea cave.

"If it were your fourth senior brother, I would definitely not let him go." Elder Shi Ding changed the subject and said, "But Luo Yan, you do have a corresponding advantage."

"What advantage?" Luo Yan was about to speak when he heard Shi Liuli ask coquettishly, "Father, don't keep me in suspense. Tell me now."

"Luo Yan has a good memory." Elder Shi Ding said with a smile, "Although the Five Qis Chao Yuan Cave is deep and winding, it is not like the Fire Yuan Cave in Shu Mountain, where the terrain changes from time to time and the way back is reshaped."

"As long as you remember the way you came, you can return safely."

"I see." Luo Yan was about to speak when he heard Shi Liuli speak first, "Then I want my junior brother to take me out to play!"

"That won't do!" Elder Shi Ding's expression suddenly changed, and he said sternly, "You are still at the Marrow Cleansing Stage, and you haven't even reached the Transformation Palace yet. What are you going to do in the Five Qis Converging to the Origin Cave?"

"I am worried about my junior brother going alone." Shi Liuli changed his words and said, "It is not only for his protection, but also to memorize the terrain in advance, so that it will be convenient for me to go there after I become a mansion."

"Absolutely not!" Luo Yan sighed, and then he heard Elder Shi Ding's firm words, his face turning pale.