Under One Person: My comprehension is unmatched.

In the backyard reception room, wisps of sandalwood incense smoke drifted out, keeping everyone away from the bloody stench of the front yard.

The Grand Elder and Zhang Yan sat facing each other, while Chai Yan stood beside the Grand Elder. The Grand Elder then spoke.

"Many thanks to Brother Zhang for your help today. If it weren't for your assistance, the Second Elder and I, these two old bones, would probably be here today."

Zhang Yan waved his hands repeatedly and spoke.

"Elder, you flatter me. Besides, it is only right and proper for us Chinese to fight together against the enemy."

After expressing his gratitude, the Grand Elder hesitated for a moment before speaking.

"Young Brother Zhang is truly righteous, but there are still a few things I don't understand. Could you please enlighten me?"

"No, no, please tell me."

"I've never seen your external martial arts technique before. I wonder where you learned it from?"

"And the Qi thread you used at the end resembled a Tang Clan technique. Could you be a member of the Tang Clan?"

The elder asked two questions in a row, which made Chai Yan, who was standing to the side, prick up his ears.

Zhang Yan took a sip of tea, shook his head slightly, and said.

"Actually, I have never learned any body-refining techniques, nor have I joined the Tang Sect, well, at least not now."

The Grand Elder and Chai Yan were even more puzzled. If they hadn't learned it, then where did their seemingly invincible defense come from?

Zhang Yan smiled, and a ball of golden Qi appeared in his hand. As he continued to circulate his Qi, the ball of Qi compressed and compressed until it became a small piece of almost transparent paper.

The paper formed from Qi landed on his fingers and wrapped around them.

"I'm sorry to have made you laugh, Elder. This is just a little trick that a friend from Longhu Mountain taught me."

The Grand Elder watched this scene with a shocked expression. First of all, he was surprised that the Grand Elder knew the Golden Light Mantra of Longhu Mountain.

He was absolutely certain he hadn't misjudged it, and judging from his tone, it was something he had learned with permission from Longhu Mountain.

Another point is that this is not simply about spreading out Qi.

Instead, it compresses without changing the area; to what extent must one utilize their Qi to achieve this?

Before the Grand Elder and Chai Yan could react, Zhang Yan extended an index finger.

A line of Qi emerged from it, stretching continuously until it disappeared from sight.

Even with the elder's eyesight at its limit, he could see the tip of the filament swaying flexibly, like an arm.

Zhang Yan then spoke.

"When I and my brothers from the Tang Clan destroyed the Medicine Immortal Sect, I witnessed their methods firsthand. This is just the result of our exchange."

"But I haven't figured out how they use the Qi lines as a mechanism yet, so I can't let go of them right now."

Just from exchanging a few words, they could achieve this level of skill and control it with ease. This alone left Chai Yan speechless with astonishment.

What kind of comprehension and talent is this? Is he a monster?

Suddenly, Chai Yan thought of something, looked at the calm Zhang Yan, and asked.

“Brother Zhang, I had some insights when you killed Chuanliu. I hope you can give me some pointers.”

Zhang Yan smiled and spoke.

"I wouldn't call it giving pointers; we're just exchanging ideas. Besides, I don't understand the methods of external training, so I can't guarantee I'm right."

At this moment, the Grand Elder spoke up without the slightest hesitation.

“Brother Zhang Yan, I have a suggestion. It’s alright if you don’t know the Vajra Body Technique; I can teach it to you.”

"This is a return gift for your help, but you can't reveal this method to anyone. What do you think?"

Zhang Yan's heart skipped a beat, and he spoke.

"That's not a good idea, especially since we've only met once."

The Grand Elder, however, burst into laughter.

“How could I, an old man, not trust someone whom even Longhu Mountain trusts? Besides, you saved the entire sect today.”

Zhang Yan thought for a moment and nodded.

The elder dictated the instructions, and Zhang Yan listened with his eyes closed, silently memorizing them while simultaneously attempting to circulate his Qi.

After finishing speaking, the Grand Elder looked at Zhang Yan, who still had his eyes closed, and chuckled.

"Young friend Zhang Yan, don't be impatient. Although this external training method is not difficult to learn, it still has certain thresholds."

"Back then, even though our sect leader was the most intelligent and had the highest comprehension among us, it still took him a whole day to master the basics."

"And I used seven days. If you can do it within ten days..."

At this point, the Grand Elder saw a fleeting glimpse of pale gold on Zhang Yan's body and suddenly choked up.

What's going on? He... he's completed a full cycle of the Qi circulation and mastered it?

"I must be seeing things," he said, turning to look at Chai Yan, only to see that Chai Yan's eyes were wide open.

"Elder, you...you look quickly."

The Grand Elder looked at Zhang Yan again and found that the pale golden color on his body had stabilized, and he was looking at him with a smile.

Oh, I wasn't seeing things! So that means he learned the Vajra Body Technique in just a few minutes?

"Second Elder, what did you just say? I didn't hear you clearly when I was circulating my Qi."

The sect leader's day is seven days for me, and Zhang Yan's is only a few minutes...

These words kept echoing in the Second Elder's mind.

"Elder? Are you listening, Elder?"

"Ah, ah, it's nothing, it's nothing, I didn't say anything just now."

The elder snapped out of his daze and spoke to Chai Yan.

"Chai Yan, now tell me what you're thinking."

Chai Yan straightened his expression, looked at Zhang Yan with hopeful eyes, and asked.

"The Vajra Body Training emphasizes the physical training of muscles, bones, and skin. If I focus on training the skin, can I achieve the same level of defense as you?"

Zhang Yan thought for a moment, then pondered it carefully before speaking.

"Exercising muscles and bones generates strength, while training the skin provides defense. Only when both are balanced and integrated into oneself can one become an indestructible Vajra. If one has only defense but no strength, how can one fight an enemy?"

"Although the basics of this external martial arts are simple, the rest is all about hard work and perseverance. Don't try to take shortcuts."

"The things passed down from our ancestors are all the things that should be done in a proper and upright way. If you have other intentions, then they are not respectable."

The elder nodded repeatedly as he listened, but he couldn't help feeling uneasy about how simple the basics were.

Upon hearing this, Chai Yan lowered her head, feeling somewhat disappointed that her idea had been rejected.

Zhang Yan smiled and said to Chai Yan, who looked dejected.

"Actually, there is another way. You can try to break down this Qi circulation method and condense the Qi on the surface when defending."

As he spoke, he raised one hand, which gradually changed from pale gold to pure gold, and then continued.

"When attacking, one can condense one's Qi and strengthen one's muscles and bones, transforming between the two with complete freedom."

As he spoke, his golden palm turned pale yellow again, and with a gentle clench, a sonic boom resounded.

The Grand Elder and Chai Yan were dumbfounded, feeling that all their years of cultivation had been in vain.

But Zhang Yan frowned and continued.

"But this has a drawback: superficial strength can easily lead to a bottleneck and stagnation."

"It's likely that our ancestors thought of these things long ago, which is why they didn't pass down this shortcut."

The Grand Elder and Chai Yan were already speechless.

Zhang Yan looked at the two silent people, awkwardly scratched his head, and said.

"These are all things I came up with on my own; just take them as a reference."

Zhang Yan and the other two came to their senses and spoke again.

"Elder, could Brother Chai come with me for the next couple of days?"

The elder glanced at Chai Yan and asked in confusion.

"As long as Chai Yan is willing, he can stay with you for as long as he wants. But I don't understand, what exactly do you want?"

Zhang Yan raised his eyebrows and uttered four words.

"To aid the enemy, to kill!"