Old Long stared at the manuscript in his hand. As he read deeper, his expression became more excited and shocked.

Lu Qing watched quietly, wondering if he had accidentally given the original manuscript to Bai Lu to copy. But then he thought, it's impossible for him to make such a low-level mistake.

"The structure of this formation is truly mysterious and unparalleled! But there are many aspects that I find difficult to comprehend." Old Long frowned slightly, realizing that his attainments in the art of formations were still insufficient.

Seeing this, Lu Qingan was secretly satisfied.

It’s okay if you don’t understand.

Only a genius can deduce the correct answer from a collection of wrong information.

Even if he himself got the copied manuscript, he might not be able to understand it.

"Fellow Daoist, I have a question for you. Are you truly a seventh-rank formation master?" Elder Long put down his manuscript and stared intently at Lu Qing'an, clearly skeptical of Bai Lu's claims. Bai Lu had previously said that Lu Qing'an was very likely a seventh-rank formation master, a speculation based solely on Lu Qing'an's Liuli Realm cultivation. After all, a Liuli Realm cultivator could only be a seventh-rank formation master at best.

A strange look flashed across Lu Qing'an's face. He knew that he was at most a third-grade formation master.

"good."

"Judging from the formation structure in your manuscript, your cultivation level may have limited your formation grade, but your attainments in formation are already far beyond mine. If you come to Void City in the future and want to take the assessment to be promoted to an eighth-grade formation master, you can come to my guild to find me. Based on your attainments, I can exempt you from the assessment." Old Long smiled, his words full of goodwill, and he was obviously trying to recruit Lu Qing'an.

At the same time, he was also applying to make friends with Lu Qingan.

Lu Qing'an didn't know what level of city Void City was, but he nodded anyway.

That’s a story for later. Anyway, it’s impossible for him to leave Panlong City in a short time.

If you are not strong enough and rashly go to places where strong people gather, you will only bring trouble to yourself.

"I have roughly browsed this manuscript. If you have any confusion, you may discuss it with me and see if I can provide some insights." Old Long also wanted to see what problems Lu Qing'an encountered.

There was definitely no problem for Lu Qing'an in the Demon Hunting Formation, as the formation had already been set up. However, there were indeed some difficulties with the other formation he was currently studying.

After a moment's hesitation, Lu Qing'an decided to raise his current problem. Elder Long had already mistakenly assumed he was having trouble setting up the Demon Hunting Formation, and the copied manuscript had been altered by him to be misleading, so it wouldn't hurt to take this opportunity to ask about other formations.

"This great demon-hunting formation is composed of several marvelous smaller formations. I'm stuck on a particular formation..."

Lu Qing'an explained the theory of thermal expansion and contraction, and began to ask what kind of array pattern he needed to engrave in order to achieve the desired effect.

"Thermal expansion and cold contraction? Fellow Daoist, I really don't understand the mystery behind this. Could you explain it in detail?" Old Long's eyes sparkled with curiosity, and he looked thirsty for knowledge.

After listening to Lu Qing'an's talk about the so-called thermal expansion and contraction, he found that he had some understanding, but his understanding was not thorough.

Lu Qing'an simply transformed himself into a physics teacher and explained the theory in detail, hoping that Mr. Long could understand the essence of it and give useful advice.

After hearing this, Mr. Long fell into a long period of contemplation and comprehension.

Suddenly, he suddenly realized something and exclaimed, "Daoist friend! Was this formation concept created by you?"

Lu Qing'an blinked and thought to himself that no one in this world should know this little bit of physics knowledge, so he nodded slightly.

"This is what is called a peerless genius!" Old Long admired sincerely.

Lu Qingan said calmly, "Mr. Long, you are too kind to praise me. I really don't deserve it."

Elder Long took a deep breath to calm his excitement, and then offered Lu Qingan some small suggestions. Upon hearing this, Lu Qingan's eyes lit up.

This old man Long told him a few array engravings for his reference.

Lu Qing'an nodded, and soon discovered that the formation was about to end.

"Fellow Daoist, this formation is about to close. If you pass by Void City in the future, I hope we can meet! I have gained a lot from discussing the formation with you this time!" Old Long smiled and bowed, his words full of sincerity.

Lu Qingan also learned something from the conversation with this high-level formation master, so he smiled and replied, "There will be a chance."

"Goodbye." Old Long said with a smile.

As the formation stopped, Old Long's shadow figure disappeared without a trace, and the door of the secret room opened immediately. The light from outside poured in, and the room suddenly became bright.

It was the first time that Bai Lu saw Old Long in this state of mind, and he was secretly amazed. When he looked at Lu Qing'an again, his eyes had become different.

"Fellow Daoist Jia is truly a hidden talent. It seems that your attainments in the art of formations are far more than just at the eighth level." Bai Lu sighed with a wry smile.

Lu Qingan responded calmly: "Mr. Long is just being polite, Fellow Daoist Bai, there's no need for this."

"Did fellow Daoist gain anything this time?" Bai Lu asked.

Lu Qingan nodded: "I have made some progress, but I still need to work harder to successfully set up the Demon Hunting Formation."

"Okay, I will keep in touch with Mr. Long. If I have any new information, I will definitely inform my friends." Bai Lu said with a smile.

Lu Qing'an nodded, then left the Formation Master Guild with Bai Lu and returned to the City Lord's Mansion.

After returning to his residence, he immediately began to study what he had just learned, and spread out the formation pattern proposed by Old Long in front of him for careful study.

"They are all seventh-grade array patterns. With my current strength, it is difficult to depict them."

This consumed too much energy and spiritual energy. Lu Qingan had no choice but to make up for his shortcomings and create a formation pattern that suited the current situation.

So he immersed himself in the deduction of the formation, and two days passed in a blink of an eye.

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