There is an open space behind the inn, which turned out to be an abandoned cabin.
Lin Feng cleared away the debris inside, moved an anvil in, and borrowed a practice hammer from Shen Wanchui.
The hammer is not heavy, weighing about a hundred pounds, which is much lighter than those used for formal forging.
Shen Wanchui said, use this to practice your hand first, don't go up and make it bigger.
Day one.
Lin Feng adjusted the parameters of the first stage on the drawing, controlled his right arm with mental power, and struck down with a hammer.
Bang!
There is an extra dent in the iron billet.
Shen Wanchui stood nearby, holding a Spirit Pattern measuring device in his hand, and glanced at the pit data.
"The angle is off by 0.3 degrees, and the strength is two kilograms more."
Lin Feng adjustment, second hammer.
"The angle is right, and the strength is reduced by one and a half kilograms."
The third hammer.
"The force is right, the frequency is 0.02 seconds slower."
The three parameters must be correct at the same time, and even one of them must be correct.
Lin Feng played for two hours.
The iron billet changed from a square strip into a twisted mass of scrap iron.
Shen Wanchui threw the scrap iron into the basket in the corner and took the second piece from the shelf.
"Continue."
In the afternoon, the second iron billet was also scrapped.
Evening, third block.
Lin Feng When he put the hammer down, the muscles in his right arm were beating slightly.
The continuous high-intensity mental power output consumed more than he expected.
Shen Wanchui squatted in front of the stove, turning over the coals with tongs without raising his head.
"Come back tomorrow."
"Hmm."
Lin Feng hung the hammer back on the wall and came out Forge.
Earth Dragon lay outside waiting, sweeping his tail twice on the ground.
Fierce Vulture glided down from high altitude and landed on the dragon's back.
On the way back to the inn, Lin Feng closed his eyes and reviewed the game.
The three iron billets were scrapped for different reasons.
The first one is that mental power does not have enough resolution to control arm muscle groups.
Fine-tuning the angle requires controlling more than a dozen groups of muscle fibers at the same time, and the response speed of three groups is slow.
The second piece is the issue of force control.
When the hammer head falls from a height, coupled with the acceleration, the actual force at the moment of contact with the iron billet will be too large, so it is necessary to stop the force immediately before the hammer falls.
The third piece is frequency.
The rhythm of two hammers per second sounds simple, but when the angle and force change at the same time, the rhythm will be disturbed.
All three problems must be solved.
He went through the solution in his mind and stored it in his memory.
I returned to the inn, took a shower, and sat cross-legged on the bed to exercise.
Lin Feng didn't think much, closed his eyes and rested his mind..
The next day.
When Lin Feng arrived at Forge, Shen Wanchui had already prepared the new iron billet.
Four pieces, arranged in a row.
"Yesterday I wasted three pieces, and today I prepared an extra piece."
Lin Feng didn't answer and picked up the hammer.
The first hammer fell.
Shen Wanchui's measuring device scanned it.
"... passed."
The second hammer.
"Passed."
The third hammer, the fourth hammer, the fifth hammer.
All passed.
Shen Wanchui's eyebrows were raised.
Yesterday, the probability that the three parameters reached the target at the same time was less than 40%, and today it is 100% at the opening of the hammer.
After sleeping all night, is this speed of progress a human being should have?
Lin Feng didn't pay attention to his expression and kept his head down.
Mental Power numbered each group of muscle fibers in the right arm, and the three groups with slow responses were specially strengthened during their exercises last night.
The force closing point is advanced by 0.03 seconds.
Frequency uses mental power to build a metronome, and the interval between each hammer is accurate to one thousandth of a second.
An hour passed.
The shape of the iron billet began to resemble a thing.
It is no longer twisted scrap iron, but a rough but regular cylinder.
Two hours.
The surface of the cylinder becomes flat.
Shen Wanchui put down the measuring device and his hands stopped shaking.
By the afternoon, all parameters of the first stage had been run.
The iron billet is not useless.
"Change to the second stage."
Lin Feng changed the grip of the hammer.
Shen Wanchui took a new iron billet from the shelf and handed it over.
In the second stage, the force increases gradually, the angle changes from 90 degrees to 87 degrees, and the frequency changes from two hammers per second to two point three hammers.
The difficulty has gone up a notch.
But Lin Feng's mental power has already heated up.
The control accuracy is even higher than in the morning.
Dang! Dang! Dang!
The frequency of the hammering sound has become faster than the human ear can tell.
The interval between each beat has shortened, but the rhythm is frighteningly steady.
Shen Wanchui stood nearby, holding the measuring device up and then putting it down.
Because there is no need to test.
The data of each hammer are within the qualified line.
to evening.
The second stage is finished.
The iron billet is not useless.
Shen Wanchui looked at the two intact training pieces on the workbench and opened his mouth.
Nothing was said.
He took back the four spare iron billets from the shelf.
"Come tomorrow and run directly to the third to tenth stages."
"Okay."
The third day.
Lin Feng arrived earlier than the previous two days.
Shen Wanchui has already heated up the stove, the iron billet is burning red, and is holding the fire tongs and waiting aside.
"We will fight continuously today, from the third stage to the tenth stage without stopping. You will pass when you finish."
Lin Feng took the hammer and stood in front of the anvil.
Take a deep breath.
The mental power is fully developed, covering all the muscle groups of the right arm from the shoulder joint to the fingertips.
The first hammer.
Bang!
The hammering sound never stopped.
In the third stage, the force is 400 kilograms, the angle is 83 degrees, and the frequency is 2.5 hammers per second.
In the fourth stage, the force is 480 kilograms, the angle is 79 degrees, and the frequency is 2.7 hammers per second.
The parameters are changing, but the rhythm of the hammer does not fluctuate at all.
Shen Wanchui's hand took out the measuring device from his pocket and stuffed it back.
He simply moved a chair and sat next to it to watch.
The fifth stage, the sixth stage, the seventh stage.
The force exceeded 500 kilograms, the angle dropped below 70 degrees, and the frequency was close to three hammers per second.
The shape of the iron billet on the anvil is constantly changing.
It changed from a cylinder to a long bar, and then gradually narrowed from the long bar to a rod shape with a subtle arc.
Stage eight.
There is a difficulty here.
The force and angle change in opposite directions.
The force is increasing, the angle is decreasing, but the frequency needs to be adjusted back.
The three parameters are pulled in different directions, and the mental force must simultaneously control the contraction and acceleration of the two muscle groups to perform opposite actions.
There was an extremely slight pause in the rhythm of the hammering sound.
Shen Wanchui's butt lifted a little from the chair.
With the next hammer, the rhythm resumed.
Shen Wanchui sat back.
The ninth stage. The tenth stage.
The last hammer fell.
clang.
The lingering sound circulated twice in Forge before dissipating.
An iron billet lies on the anvil.
The surface is smooth, the curvature is smooth, and the cross-section texture is so uniform that the difference is almost invisible to the naked eye.
Zero mistakes.
Shen Wanchui stood up from the chair, walked to the anvil, and looked down at the iron billet for half a minute.
"Three days."
He raised his head.
"It took my son ten years of study to reach your current accuracy."
Lin Feng put the hammer down and stretched his wrist.
"Your son is not Psychic Master."
"... That's true."
Shen Wanchui patted the dust off his hands and walked to the giant black furnace in the back.
Press your hand on the furnace door valve.
"Tomorrow, open the furnace."
Lin Feng When we came out of Forge, it was already dark.
Earth Dragon and Fierce Vulture were waiting outside. After the temperature dropped, Fierce Vulture no longer flew so high.
On the way back to the inn, the communicator vibrated.
Elder Zhou.
"Qian Weiguo's encrypted signal, intercepted twice."
Lin Feng Put away the communicator.
Arrive at the inn.
I opened the door and went in, turned off the lights, and after taking a shower, I sat on the bed and did some exercise.
The exercise ran for about twenty minutes.
The mental power captured the changes outside the inn.
Three breaths.
The one coming from the west was not very fast and was deliberately suppressed.
Martial Saint four sections.
They are not the same group as the two "passers-by" who were followed before.
The Qi and blood characteristics of these three people are completely different, with a sense of uniformity that has been systematically trained.
Born in the regular army.
The three of them did not enter the inn.
Stopping in the alley behind, my breath was at its lowest, and I lay down motionless.
Lin Feng didn't open his eyes.
Waited ten minutes.
One of them moved.
The footsteps walked around the side of the inn and arrived at the main entrance.
There was a knock on the door twice.
Lin Feng Open your eyes.
"Come in."
The door opens.
A woman in her early thirties, quite tall, wrapped in a dark gray windbreaker, with her hair tied into a neat ponytail.
"Second Lieutenant Lin."
She bowed slightly.
"Su Wanqing, Vice Minister Qian sent me here."
She took out a sealed envelope from the inside of her windbreaker, took two steps and put it on the table.
"Vice Minister Qian said that the sincerity of cooperation lies in it."
Lin Feng didn't reach out.
I scanned it mentally first.
There is a piece of thin paper in the envelope, no toxin residue.
Clean.
He opened it.
There is a set of longitude and latitude coordinates written on the paper, with a line of words below:
"Here is the quenching medium you need Mystic Nether Cold Iron Water, Qian Weiguo."
Lin Feng's finger stopped on the words "Mystic Nether Cold Iron Water".
This thing is indeed mentioned in the blacksmithing manual.
After Star Dragon Bone Essence is forged and formed at a high temperature of 36,000 degrees, the quenching process requires an extremely cold medium to neutralize the violent spiritual energy remaining inside.
Mystic Nether Cold Iron Water is the optimal solution.
Before he even looked for it, Qian Weiguo was brought to his lips.
This person has a deeper grasp of the information in the Secret Realm than he thought.
"Thank you Vice Minister Qian for me."
Lin Feng folded the note in half and put it in Storage Ring.
Su Wanqing nodded, turned and walked towards the door.
When he reached the door, he stopped.
"By the way, Second Lieutenant Lin."
She turned halfway.
"Vice Minister Qian asked me to tell you something: the water in the northwest is very deep, and there are some things that one person cannot eat."
After saying that, the door was closed.
The sound of footsteps faded away.
Three breaths left the alley one after the other and disappeared toward the southeast.
Lin Feng sat on the bed and read the note again.
The coordinates point to the depths of the wasteland, about eighty kilometers from the entrance to the Secret Realm.
He took out his communicator and sent the coordinates and the contents of the note to Elder Zhou.
The reply arrived a minute later.
"Coordinates confirmed. There is an underground cold spring there. It is recorded in the military geological archives. It is the highest secret level and has never been developed."
"The fact that Qian Weiguo can produce this means that he has had access to the top-secret geological archives."
"Be careful when you go to get the cold iron water, there may be an ambush."