Chapter 19: The Door That Should Never Open
The second knock still seemed to echo through the depths of Echo Ridge when the Council's cultivators began their procedure.
Han Feng remained concealed among the rocks overlooking the mine entrance.
From his position, he could distinguish the formation specialists from the ordinary guards. He could see the instruments being carried into place, the movements of the cultivators, and the subtle changes in the spiritual energy surrounding the mountain.
He could not hear every conversation.
He did not need to.
The arrangement of the instruments alone told him that the operation had been prepared well in advance.
Six bronze discs were placed around the entrance. Each bore concentric inscriptions, with a small jade needle fixed at its center. The cultivators connected the discs using thin strands of dark metal, forming an imperfect arrangement that resembled the symbol of three crossed lines.
Han Feng recognized the general principle.
The discs were not gathering energy to attack something. They were measuring fluctuations in spiritual energy and comparing the results between different positions.
The formation was attempting to establish a stable reference within a region where ordinary references had failed.
It was a reasonable approach.
It was also dangerous.
The problem did not lie in the instruments themselves, but in what they were intended to measure. If the phenomenon inside the mine truly altered the relationship between distance, perception, and presence, then any mechanism relying on fixed references could produce misleading results.
A measurement might appear accurate while describing something that no longer existed in the same place.
Han Feng watched as one of the specialists finished adjusting the final disc and stood.
"The six positions are stabilized."
A tall man in the official robes of the Regional Council approached. His gray hair was tied behind his head, and he carried a black wooden staff. Unlike the other cultivators, he did not need to consult the instruments to know where each component belonged.
"And the subterranean flow?"
"Irregular, but measurable. The intensity falls every three breaths and returns after approximately seven. The pattern is similar to the records obtained at the mountain installation."
The gray-haired man frowned.
"Similar, or identical?"
"Similar. The periodicity matches, but the intensity is different. The mine produces a stronger response."
"Then we are not dealing with a simple repetition."
The specialist hesitated.
"It is possible that the three locations are connected."
"Possible is not sufficient. We need confirmation."
The gray-haired man turned toward the open mine entrance.
"Begin the first stage."
The specialists moved immediately.
Spiritual energy flowed through the metal wires, passing from one bronze disc to the next. The inscriptions glimmered faintly. One by one, the jade needles rotated until they pointed toward the interior of the mountain.
For the first moment, nothing happened.
Then the spiritual energy disappeared.
It did not diminish gradually. It was not absorbed by the discs or dispersed into the surrounding air.
It simply ceased to exist within the circuit.
It was as though a section of the formation had been erased without disturbing anything around it.
One specialist stumbled backward.
"Interruption at the fourth position!"
Another examined the corresponding disc.
"The instrument remains intact. There was no overload."
"Restore the flow," ordered the gray-haired man.
The cultivators obeyed.
This time, the energy circulated for five breaths before disappearing again.
The gray-haired man watched the jade needles.
"The anomaly is responding to the formation."
"Or the formation is interfering with the anomaly," the specialist corrected.
The man with the staff did not seem pleased by the distinction.
"Continue. Reduce the energy by half."
Han Feng watched the third attempt with growing attention.
The energy did not disappear at the same position each time.
During the first attempt, the fourth point had lost its connection. During the second, the interruption had occurred between the second and third discs. Now the flow passed through all six positions, only to vanish when it should have returned to its origin.
The system was not failing randomly.
Each attempt seemed to produce a different response.
Or perhaps something was observing the formation and refusing to answer in the same way twice.
Han Feng disliked that possibility.
The Art of the Celestial Veil concealed his aura, but it did not make him immune to the effects of an unknown structure. If the phenomenon could perceive the Council's formation, it might also perceive other presences nearby.
He shifted several steps backward, choosing a position from which he could retreat down the slope quickly.
That was when he noticed the gray-cloaked man.
He stood near the mine entrance, speaking with two specialists. He carried no visible weapon, and his hands remained hidden within his sleeves. His expression was as grim as it had been the previous night.
The man did not appear to agree with the procedure.
When the gray-haired Council representative ordered the instruments prepared for a fourth attempt, the cloaked man stepped forward.
"We should stop."
The representative turned toward him.
"You have already raised that objection."
"And the results continue to confirm my concern. The third point is not stabilized."
"The instruments indicate that we can establish a temporary reference."
"The instruments indicate that we can measure part of the phenomenon. That does not mean we can control it."
The gray-haired man tightened his grip on the staff.
"The Threshold Society received authorization to investigate the structure, not to prevent the Council from advancing."
The gray-cloaked man's expression remained unchanged.
"The Society also recorded the disappearances."
"Incomplete records."
"Three teams have disappeared in the past decade."
The silence that followed was significant.
The specialists pretended to concentrate on their instruments. The guards glanced discreetly at the two men, but none intervened.
The Council representative stepped closer.
"The teams disappeared because their leaders did not understand what they were investigating. We have better instruments, more information, and a stabilization method that did not exist at the time."
"The method has not been tested."
"It will be tested now."
The gray-cloaked man remained still for several moments.
Then he stepped away.
He did not appear convinced.
He looked as though he had realized that words would not stop the operation.
Han Feng watched the Council representative raise his staff.
The fourth attempt began.
This time, the specialists used more than the six bronze discs.
Two cultivators opened long cases and removed several small metal plates. Han Feng recognized the patterns engraved on their surfaces: crossed lines surrounded by incomplete circles.
They belonged to the same family of instruments he had discovered in the old Nine Axes Workshop.
The cultivators placed the plates before the mine entrance and activated their inscriptions simultaneously.
The result was immediate.
The spiritual energy in the region dropped abruptly.
The leaves stopped moving.
The sounds of the hillside vanished.
For one brief instant, even Han Feng's breathing seemed to lose its presence in the world.
Then a vertical line appeared inside the mine.
It was thin, pale, and perfectly straight.
It did not illuminate the walls.
It cast no shadow.
It seemed to exist upon the perception of the observers themselves—as though someone had drawn a crack across the very idea that the space before them was continuous.
The specialists froze.
The Council representative took one step forward.
"Increase the stability. Do not increase the energy."
The inscriptions on the discs brightened.
The vertical line lengthened.
First, it reached the ground.
Then it extended toward the ceiling of the entrance. Within moments, it seemed to cross the entire passage, although the pale light did not illuminate a single stone around it.
Han Feng felt the Celestial Diagram vibrate beneath his clothing.
It was not an ordinary vibration.
The artifact responded with three rapid pulses, followed by a prolonged interval.
Han Feng immediately suppressed his own energy. He controlled his breathing until he could barely feel his lungs move.
The pattern resembled the knocks heard inside the mine.
Three responses.
A pause.
The fourth had not yet arrived.
The gray-cloaked man noticed something and turned sharply toward the specialists.
"Disconnect the formation!"
No one obeyed immediately.
The Council representative raised his voice.
"Maintain the formation!"
"The reference is changing!" one specialist shouted. "The fourth position is recording a negative distance!"
The gray-haired man turned pale.
"That makes no sense."
"The instruments are confirming it!"
The jade needles began spinning uncontrollably. One bronze disc cracked, and the spiritual energy flowing through its wires vanished. Another disc remained intact, but its inscription inverted, as though the engraved lines had changed direction.
The gray-cloaked man rushed forward and tore one of the metal plates from the ground.
The vertical line wavered.
For a brief instant, every sound returned to the hillside at once: the wind, the leaves, the voices, and the clatter of the instruments.
The sudden noise was so violent that two guards fell to their knees.
Then silence returned.
The line remained.
The Council representative stared at the plate in the cloaked man's hand.
"What have you done?"
"I interrupted a connection we do not understand."
"You may have destroyed the procedure!"
"Or prevented it from completing."
The two men stared at each other.
Before either could speak again, the vertical line expanded.
It did not widen gradually.
For one instant, it seemed to occupy the entire mine entrance. The pale light covered the stones and erased the shadows cast by the cultivators.
Han Feng felt a pressure pass through his body.
It was not spiritual energy.
It was the sensation of something very distant drawing closer without traversing the intervening space.
The Celestial Diagram vibrated again.
This time, Han Feng sensed a response that did not come from the mine.
An ancient presence, silent and indifferent, seemed to turn its attention toward the disturbance.
There was no face.
No voice.
No defined image.
Only the impression of a consciousness existing far beyond the limits of Han Feng's understanding.
Almost simultaneously, another presence emerged at the edge of his perception.
It was different from the first.
Sharper.
More concentrated.
Like a will examining every change in the world for a possible advantage.
It did not approach, but Han Feng felt that it had noticed the alteration in the balance between distant points.
He suppressed every unnecessary thought.
He did not reach toward either presence.
He did not give them names.
He did not allow his perception to extend toward the vertical line.
He did not know who—or what—stood on the other side.
And he had no intention of discovering it by allowing it to perceive him clearly.
The line began to contract.
The Council's specialists had already lost control of their instruments. One metal plate floated several inches above the ground. Another was pulled toward the mine entrance, although no one was touching it.
The gray-cloaked man tried to retreat.
Then the fourth knock came.
This time, it did not come from inside the mountain.
It came from the vertical line.
The sound crossed the hillside without producing an echo. The cultivators nearest the entrance lost their balance, and one specialist fell sideways, clutching his chest.
All six bronze discs went dark at once.
The line opened.
Behind it was not darkness.
There was another landscape.
Han Feng could not distinguish its details. He saw only an indistinct expanse crossed by shapes that resembled mountains and ruins, yet did not obey ordinary perspective.
The distances between objects changed whenever he tried to examine them.
The horizon appeared both close and infinitely far away.
The opening lasted only an instant.
But it was long enough for a gust of air to pass through the mine entrance.
The wind carried no scent of earth, minerals, or vegetation.
It was dry, strange, and utterly foreign to the surrounding environment.
When it struck the cultivators, the spiritual energy within their bodies fluctuated violently.
One of the guards screamed.
His shadow disappeared.
The man remained standing, but the shadow that should have rested beneath his feet was gone. He stared at the ground in confusion and attempted to retreat.
Then his body was pulled forward.
There were no hands.
No chains.
No visible formation.
The guard slid several steps toward the vertical line, as though the space before him had acquired an impossible slope.
Two companions seized his arms.
They were dragged forward as well.
The gray-cloaked man reacted immediately. He threw the metal plate against the ground and released a wave of spiritual energy that struck the three guards.
The pressure hurled them backward.
The first crashed against the stones. The other two rolled toward the outer formation, injured but free from the force pulling them toward the opening.
The vertical line shuddered.
The Council representative raised his staff and ordered everyone to abandon the area.
No one needed to hear the command twice.
The specialists began rushing to recover their instruments, but the gray-cloaked man stopped them.
"Leave everything!"
"The records—"
"If you remain here, there will be no one left to read them!"
The group retreated beyond the formation marks.
Han Feng remained hidden, watching the vertical line.
The landscape on the other side had vanished, but the opening remained. Small ripples passed across its surface, as though something were pressing against the boundary without being able to cross it completely.
Then Han Feng noticed a detail.
The opening was not facing a single place.
With every oscillation, its depth seemed to change. For a moment, he had the impression of seeing the same mountainous region. Then the scene shifted into an expanse of dark stone. At another instant, there was no landscape at all—only a sensation of distance without direction.
The Threshold Society had not opened a stable passage.
It had created a momentary connection between the mine and something that could not be identified.
And the connection seemed unable to maintain a single reference.
Han Feng understood why the gray-cloaked man feared the opening.
If it had no fixed destination, there was no guarantee that the same passage would lead to the same place twice.
Nor was there any guarantee that something would cross in only one direction.
The vertical line began to close.
The Council's cultivators were already dozens of steps away from the entrance. The gray-haired man still held his staff aloft, but his expression revealed that he had lost confidence in the procedure.
"The third point is closing," one specialist said.
"Do not approach," the gray-cloaked man replied.
"If we can record the final fluctuation—"
"Do not approach!"
His voice echoed across the hillside.
For a moment, everyone obeyed.
Then something appeared on the surface of the line.
It was not a person.
It was not a hand.
It was a dark mark, resembling the outline of an incomplete circle.
It appeared at the center of the opening and remained motionless as the pale light retreated around it.
Han Feng felt his blood turn cold.
The symbol resembled the one found in the mine, but there was one essential difference.
The circle did not have three interruptions.
It had four.
One of the crossed lines passed through the center, ending at a point that seemed not to belong to the drawing.
The mark was not engraved on a surface.
It floated within the opening, as though it were a feature of whatever existed beyond it.
The Celestial Diagram vibrated.
Han Feng felt a brief pain in his chest, deep enough to make him grit his teeth. It was not a physical injury, but a reaction from the artifact that manifested as pressure within his body.
He controlled his breathing and forced his aura to remain concealed.
The dark symbol moved.
It did not advance toward the mine.
It rotated slowly, as though searching for a particular orientation.
When one of its lines pointed toward Han Feng's position, the Celestial Diagram became completely motionless.
For an instant, Han Feng was certain that the mark had found something.
He did not know whether it was him, the artifact, or simply a direction corresponding to his position.
He had no intention of waiting to find out.
Han Feng retreated without producing a fluctuation of spiritual energy and began descending the slope. Every movement was calculated to avoid loose stones, dry branches, or any sound that might reveal his presence.
Behind him, the gray-cloaked man shouted orders.
The instruments continued to fail.
The dark symbol remained at the center of the opening.
Han Feng did not look back.
Only after reaching an area covered in dense vegetation did he allow his perception to expand again. The vertical line had disappeared, but the mountain's spiritual energy remained irregular. The Council's formations were inactive, and the cultivators were beginning to organize the wounded.
The operation had failed.
But not entirely.
They had managed to open the passage for a brief instant.
And something had answered.
Han Feng accelerated.
He did not intend to return to Yunhai immediately. He needed to move away from the mountain and find a secure place to examine the Celestial Diagram.
Its reaction to the four-interruption symbol had been unlike anything he had experienced before.
He could not ignore the possibility that the complete plate and the artifact were connected to the phenomenon in a way he still did not understand.
When he reached a distant stream, he stopped and knelt beside the water.
His reflection showed only a calm face, black hair, and purple eyes beneath the shade of the trees. Nothing in his appearance revealed the pressure still lingering in his chest.
Han Feng removed the Celestial Diagram from its concealment.
Its surface remained dark.
He waited.
No vibration came.
Only then did he realize that, during the brief instant when the symbol had pointed toward his position, the artifact had responded not with a sequence of pulses, but with a complete absence of movement.
It was a small detail.
Perhaps insignificant.
But Han Feng had learned to pay attention to precisely those things that contradicted established patterns.
He put the Celestial Diagram away.
The complete plate had not been activated directly by him. The Threshold Society had used its own instruments to open the passage. Therefore, the relationship between the artifact and the phenomenon remained unclear.
What was clear was that the opening had reacted differently when the dark symbol appeared.
And for an instant, the mark had seemed to orient itself toward the place where Han Feng was hidden.
He did not know whether that meant he had been observed.
From that moment onward, however, he would have to act as though the possibility were real.
By nightfall, Han Feng found shelter in an abandoned structure several kilometers from Echo Ridge.
Travelers had once used the place, but it had been empty for a long time. The roof had several holes, and the walls offered little protection against a direct attack.
Still, it was sufficient for a brief rest.
Han Feng sat on the floor and took out the notebook from the Nine Axes Workshop.
He reread the sentence about the three points.
The first point records. The second compares. The third permits passage, but we do not know what passing means.
The sequence now seemed even more important.
The first point, at the mountain installation, might have been used to observe changes.
The second, at the mine, seemed to compare states or references.
The third, likely connected to the opening, permitted a connection.
But there was a problem.
If the three points were merely parts of a mechanism, the Threshold Society should have been able to control their sequence. Yet the instruments had failed, and the opening had displayed images that were incompatible with one another.
Perhaps the system was incomplete.
Or perhaps it worked exactly as its creators intended, while the researchers misunderstood its functions.
Han Feng took out the metal plate and examined the complete circle.
Then he placed the fragment recovered from the mine beside it.
The two pieces did not physically fit together, but their designs seemed to belong to the same set. The complete plate displayed three crossed lines inside a continuous circle. The fragment contained an interrupted circle, and its internal markings suggested that the interruption was not a manufacturing defect.
Perhaps the interruptions were necessary to measure or compare conditions between the points.
Perhaps the complete circle represented a state in which the connection was no longer limited.
Han Feng disliked that interpretation.
It implied that the complete object might have a far more dangerous function than he had imagined.
He put the pieces away.
At that moment, the Celestial Diagram vibrated once.
Han Feng raised his head.
The sensation did not come from the direction of Echo Ridge.
It came from much farther away.
For an instant, he sensed the two presences again.
The first remained distant and silent, like an existence that did not need to act to exert influence.
The second seemed more alert now, as though the brief opening had provided it with new information.
Neither attempted to establish contact.
Neither revealed its identity.
Han Feng did not respond.
He remained motionless until the impression faded.
Then he looked toward the metal plate concealed beneath his robes.
The Threshold Society believed it had opened a passage.
Perhaps it had.
But the landscape seen through the vertical line had not remained stable. The symbol with four interruptions had appeared only after the opening began to close. And the Celestial Diagram had reacted abnormally at that exact moment.
Han Feng began considering a different hypothesis.
Perhaps the third point was not a door leading to another place.
Perhaps it was a boundary capable of assuming different forms depending on what lay beyond it—or on what was attempting to cross.
In that case, the Threshold Society was not simply opening a path.
It was attempting to determine which realities could be connected.
And if the three points belonged to a much older system, the Convergence might be changing the conditions under which that system operated.
Han Feng closed his eyes for several moments.
He did not have enough evidence to reach a definitive conclusion. He still needed to investigate the Society's archives, discover the fate of the missing teams, and understand why the Celestial Diagram reacted to those structures.
But one certainty could no longer be ignored.
The next opening would be different.
The researchers now knew they could produce a momentary connection. They also knew that the connection could fail, alter spatial references, and allow something to manifest on the other side.
It was unlikely they would abandon the project.
The Council demanded results, and the Threshold Society had already invested too many resources to withdraw.
Han Feng put away the notebook, extinguished the light, and stood.
He needed to reach the next point before they did.
Not to open the passage.
To discover how to close it.
Because when the fourth knock came again, there might no longer be an entire mountain between the Gu World and whatever waited beyond the boundary.
That night, far from Echo Ridge, an ancient structure answered the disturbance with a nearly imperceptible vibration.
For the first time, the symbol engraved upon it did not remain still.
A fourth line appeared at the center of the circle.
And in the silence that followed, something that should never have found that path began searching for a direction.