Xu Yunfan raised an eyebrow at this sight. The facilities in Tiangong City were convenient, and he hadn't expected even the authentication process to be so ingenious.
"Yes, I am correct."
This person originally belonged to the Hidden Edge Pavilion, but after being promoted to elder, he naturally broke away from the Six Ministries and became independent.
When he saw that the visitor was Xu Yunfan, the newly promoted true disciple of the Weapon Forging Hall, he had no ill intentions. He just looked him over curiously for a few moments before handing back the true disciple token and giving him a word of advice.
"Without the official seals and letters of the heads of each department, you may not take the martial arts manuals out of the library. There is another door ahead where you can insert your token."
"Thank you for informing me, Elder."
After receiving the token, Xu Yunfan slowly stepped into the library.
The library is located deep within Tiangong City, and is entirely bathed in the cold light of fluorite.
After turning the token three times in the groove of the steel door in front of him, the sound of the mechanism running and the clicking of the gears turning intrigued him.
After the mechanism opened the door on its own, what hit us was not a musty smell, but a strange aroma mixed with the scent of metal and medicine.
As you descend the spiral stone steps, the stunning truth of this library gradually unfolds on the rock walls on both sides.
The so-called library is actually a hollowed-out section of the Tiangong Cave, with at least four floors.
Embedded in the rock strata are not only scrolls, but also countless strange minerals sealed in glass, and you can even see flowing magma surging in transparent pipes embedded in the rock strata.
Glass? !
Xu Yunfan couldn't help but step forward to take a look, but the transparent pipe didn't make any crisp sound; instead, it had a dull feeling.
It must be some kind of ore.
What is the purpose of this pipe?
Only after reaching the book reading area of the First Floor Melting Gold Hall did they discover that there were a few disciples browsing and studying the books in the library.
Looking at the bookshelves crammed full of books, the fluorescent stone and the surrounding lava illuminated the entire library as if it were daytime.
Xu Yunfan slowly browsed through the book, then suddenly stopped, took out the book in front of him, and ran his fingertips over the yellowed pages of "The Classic of Earth Vein Mineral Identification," which recorded the basic mineral identification techniques of the Melting Gold Hall.
He immediately found a seat and sat down.
"...Red copper has veins like earthworms, and it freezes into frost when it is cold; cold iron has patterns like torn silk, and it roars like a dragon when struck."
Upon seeing this, Xu Yunfan suddenly slapped his thigh. The crisp sound was extremely clear in the quiet library, attracting everyone's attention.
Xu Yunfan realized what was happening in an instant and quickly responded with an embarrassed gesture.
When the group saw that it was Xu Yunfan, the recently famous disciple, they gave up their intentions. They wanted to chat, but they were hesitant and timid.
Back then, Xu Yunfan's figure wielding a heavy hammer and his cold expression on the martial arts training ground in the True Inheritance Hall were still fresh in everyone's memory.
Xu Yunfan suddenly remembered that he had encountered this strange phenomenon several times when he was mining in Ningguta. When he couldn't dig any deeper, he changed directions and found that it was actually red copper.
He then remembered the pile of black iron next to the old craftsman in the weapon-making hall. It turned out that the direction of the ore vein and the folds of the mountain were so particular.
"You've carefully read the 'Treatise on Earth Vein Minerals,' and you vaguely feel that the Heavenly Crafting Technique seems to have been somewhat improved."
There's hope!
Xu Yunfan's expression brightened. He put the book back and went to the mechanical hall area. Just as he was about to take out "The Essentials of a Thousand Machines", the vibration of the mechanical hub came from underground.
That's interesting.
Xu Yunfan looked at a mechanism on the bookshelf that was being pressed down by the Thousand Secrets Manual. Just as it was about to pop out, a mechanism inside the rock wall made a sound.
It is clearly for this kind of ingenious idea.
On the yellowed diagram, the first master of the Mechanical Hall used cinnabar to outline the structure of the repeating crossbow.
"The engagement of the wheels requires seven layers; the tension of the bowstring is accumulated using a winch; and when arrows are quenched, adding shards of cold iron can penetrate heavy armor."
Xu Yunfan slowly turned the pages of the book. The further he went, the more complex the Thousand Machines Technique became. The disciples of the Mechanical Hall had studied and supplemented it over the generations. Finally, when the tiger-shaped mechanical beast from three hundred years ago appeared, Xu Yunfan's eyes were opened.
On the deepest bronze bookshelf, on the cover of "The Essentials of Heavenly Crafts," a must-read for disciples of the Heavenly Crafts Department, there is an exquisite human portrait.
"...To build the wall, one must use soil from the shady side of the mountain, mixed with glutinous rice paste and oyster shell ash. During the ramming process, rhinoceros blood should be sprinkled on it to repel insects and ants."
As he read this, his gaze swept over the reinforced rock layers beside the magma conduit, and he finally understood why the Tiangong Cave had not collapsed even after a century.
Until dawn the next day, Xu Yunfan looked at the dozen or so Heavenly Craft Forging Technique completion prompts that appeared in his field of vision.
Xu Yunfan asked the disciples of each hall, and they learned that in addition to martial arts skills, each disciple must specialize in these areas of knowledge. Only after accumulating a certain level of expertise and passing the assessment will they be taught the key techniques of each hall.
Over the years, the martial arts of each department have basically been integrated into the profession.
The Melting Gold Hall's Melting Gold and Forging Iron Technique, the Mechanism Hall's Hundred Refinements and Silk Entangling Technique, and the Heavenly Crafts Department's Mysterious Turtle Camel Mountain Strength were all basically learned on the job.
"Learn by doing."
Upon hearing Xu Yunfan's question, the disciples of the Melting Gold Hall, who were about to leave the library, picked up an extremely sturdy pickaxe. As the Melting Gold Hall's finger snapped in half, the pickaxe made a series of mechanism clicks and quickly transformed into a long-handled broadsword.
The disciple of the Melting Gold Hall laughed and said, "Senior Brother Xu, you may not know this, but the Melting Gold and Forging Iron Technique can only temper the body and strengthen the physique by constantly mining while going down into the mine. Over time, the Geng metal aura of the earth vein minerals will be integrated into the flesh and blood, making the physique stronger and stronger. It is no less than the Copper Body Technique of the Weapon Forging Hall."
In their excitement, the disciples of the Melting Gold Hall even shrugged in front of Xu Yunfan.
Xu Yunfan: "..."
Then, a second later, he was smacked on the head by the Melting Gold Hall steward who rushed over. While bowing and apologizing to Xu Yunfan, he quickly pulled him away.
I see.
Xu Yunfan seemed to be pondering, meaning that if one wanted to master the entire Heavenly Craft Forging Technique, one would probably have to learn all the martial arts techniques from all four parts before achieving any success.
As Fu Jin said, the two characters "tiangong" (meaning "Work of Heaven" or "Heavenly Craftsmanship") encompass everything.
It was a massive project.
Xu Yunfan immediately dismissed the idea. There was no rush. He would do it after he had completed his bone training. In the meantime, he would take the time to finish reviewing these basics.
Just treat it as a hidden achievement.
When Xu Yunfan turned back to return home, he went into the library again.
This time, I didn't stay long. I asked the elder on duty and found out that all the martial arts collected and created by Tiangong Cave over the generations were on the third and fourth floors.
The core martial arts techniques of each department are also included, but if you only look at them without actually practicing them, the results will be minimal.
Half a day later, Xu Yunfan, carrying the seal of Zhan Yan and a borrowing slip, borrowed a martial arts manual from the library.
Nine Mysterious Dragon Mace.
Although this method of using the mace is not considered top-notch, and even falls short of second-rate skills, it contains a comprehensive range of basic mace-generating techniques.
If one masters it, with the Nine Transformations Returning to Origin as the core, and through the combined application of the nine basic power-generating methods, one can easily split mountains and shatter rocks, achieving the effect of one mace breaking through all techniques.