Monday morning. Six fifty AM.
Han-Ho was at the deep central access point of the fracture network under the Han River.
Not the bank. The actual river. Wading again. Work trousers rolled to the knee. Shoes lined up on the bank with the practiced precision of a man who cared about where his shoes were.
The equipment team was on the east bank running the deep scan array.
The old man was on the west bank.
Not helping. Just present. The way he had been present every morning since Thursday. Standing at the bank watching Han-Ho work with the focused attention of someone reading something they have been trying to read for eight thousand years and are finally close enough to see the words.
Han-Ho pressed his hand flat against the riverbed.
Read the network.
Made notes.
The western sections were clear. Completely clear. The pressure redistribution the old man had felt on the KTX was real and measurable. The cleared western sections were pushing against the remaining blockage from the inside. The deep central sections under the river were the main remaining work.
He started.
The cleaning took four hours.
Section by section. The way it always was. Outside in. No rushing. No escalating.
At ten seventeen AM he reached the last deep central section.
Pressed his hand against it.
Read it.
It was the densest blockage he had encountered in the entire network. Twenty thousand years of accumulation concentrated in the deepest point of the system. The equivalent of the original source of the blockage. Whatever had caused it twenty thousand years ago had been centered here.
He applied more effort.
The glow brightened slightly.
Not dramatically. Not the way S-Rank power surges looked in footage. Just slightly warmer. The cozy golden light of Stain Removal doing what it had always done but doing it harder because the stain was harder.
"Stubborn," said Han-Ho.
Moru on his shoulder was very still.
The equipment team on the east bank watched their instruments.
The lead specialist looked at his screen.
Looked at the screen again.
Looked at Han-Ho in the river.
"Mr. Kang," said the specialist.
"Not now," said Han-Ho.
"The readings—"
"Not now," said Han-Ho.
He kept cleaning.
The dense blockage resisted.
Not actively. Not with intent. Just the passive resistance of something that had been in one place for twenty thousand years and had no mechanism for being elsewhere.
Han-Ho had cleaned things that resisted before.
The crystallized demon blood in the Itaewon parking garage.
The Frost Giant's nine thousand year old glacial power.
The Demon King's ten thousand year old seal.
This was stubborn.
But stubborn was just a stain with a longer history.
He cleaned it.
At ten forty nine AM the last section cleared.
Han-Ho felt it go.
Not dramatically. Not explosively.
Just — gone.
The way a stain goes when the cleaning is complete. One moment it is there. The next moment it is not. And the surface beneath is what it was always supposed to be. Clean. Original. Correct.
He sat back in the river.
Looked at the riverbed.
Clean.
Completely clean.
No blockage. No contamination. No twenty thousand year old accumulation of whatever had been preventing the Dragon Vein network from doing what it was supposed to do.
Just clean bedrock under clean river water.
He nodded.
Stood up.
Made a note.
Deep central sections complete. Fracture network fully clear. All blockage removed. Dragon Vein network clear on Earth side. Upstream connections remaining — these are the connection points to other world networks. Filing completion report.
He filed it.
Then something happened.
The Dragon Vein network responded.
Not immediately. Not explosively.
A pulse.
One clean pulse of energy moving through the cleared network. Starting at the deep central point where Han-Ho was standing. Moving outward through the entire network simultaneously. Through the western sections. Through the eastern sections. Through the connections under Seoul. Under the surrounding districts. Under Korea. Under the sea to wherever the Dragon Veins connected next.
Han-Ho felt it through his feet.
Through the riverbed.
Through his hand still pressed against the surface.
Clean energy.
Not mana. Not qi. Not any specific type of energy the Registry classification system had a name for.
Just clean energy.
Moving through a system that had been blocked for twenty thousand years and had just been unblocked.
The way water moves when a dam is removed.
Not violently.
Just inevitably.
Han-Ho stood in the river and felt it pass through him and said nothing for a long moment.
Then he made a note.
Dragon Vein network activated. Clean energy pulse confirmed. Full system flow initiated. Cheongi confirmed: this is correct. Upstream connection points will activate next. Recommend monitoring all Dragon Vein adjacent sites.
He filed it to the Director, Ms. Yoon, and the equipment team simultaneously.
Waded to the bank.
Put on his shoes.
Looked at the old man on the west bank.
The old man had gone very still.
Not meditation still.
The specific stillness of something that has been waiting for something for eight thousand years and has just felt it arrive.
"Old man," said Han-Ho.
The old man did not respond immediately.
He was listening.
To the Dragon Veins.
To the music he had described on the KTX.
But louder now.
The full network active.
Not just the cleared western sections.
All of it.
Han-Ho waited.
He was good at waiting.
After three minutes the old man looked at Han-Ho.
His sky-before-dawn eyes were doing something they had not done before.
Not crying.
But adjacent.
"Done," said Han-Ho.
"Yes," said the old man. Very quietly.
"The upstream connection points are next. Those connect to the martial world and whatever else is attached to the network."
"I know," said the old man.
"I will need your mapping data for those sections. The connection points are on your side of the dimensional boundary."
"I know," said the old man.
"Wednesday meeting. Registry. Ms. Yoon will have the comparative maps ready."
"I know Han-Ho."
Han-Ho looked at him.
"Are you okay," said Han-Ho.
The old man looked at the river.
At the Han River flowing over a clean Dragon Vein network for the first time in twenty thousand years.
"Eight thousand years," said the old man. "I tried to clear this for eight thousand years."
"I know," said Han-Ho.
"From my side."
"I know."
"I could not reach it."
"I know."
"You cleared it in—" The old man stopped.
"Five weeks," said Han-Ho.
"Five weeks," said the old man.
"It was dirty," said Han-Ho. "It needed cleaning."
The old man looked at him.
Han-Ho looked back.
"Yes," said the old man. "It did."
They stood at the river bank.
The Han River flowed.
The Dragon Veins pulsed with clean energy for the first time in twenty thousand years.
The equipment team on the east bank was very busy with their instruments and not looking at anything except their screens because the readings were doing things that required full professional attention and also because some moments belonged to the people in them and the professional thing to do was focus on the instruments.
"GS25," said Han-Ho.
"Yes," said the old man.
They walked.
At the GS25 Cho Hyun was on shift.
He looked at Han-Ho.
Looked at the old man.
Looked at the specific quality of the old man's expression which was the expression of someone who has just experienced something that required ten thousand years to arrive at and is still processing it.
Cho Hyun put two tuna mayo kimbap on the counter.
Put the honey butter chips next to them.
Put a third kimbap down.
Looked at the old man.
"You look like you need one," said Cho Hyun.
The old man looked at the kimbap.
"Yes," said the old man. "I think I do."
He paid for his own kimbap.
Han-Ho looked at him.
"You have Korean currency," said Han-Ho.
"Ms. Yoon arranged it when we registered," said the old man. "The Registry has a dimensional visitor account system."
"She created that last week," said Han-Ho.
"Yes," said the old man. "She is very efficient."
They sat outside on the plastic stools.
Ate their kimbap.
The Monday morning Mapo-gu did its Monday morning things.
Kjor ate chips.
Moru watched Han-Ho eat with nutritional supervision focus.
River looked at the street.
"Extraordinary," said River.
"Yes," said the old man.
It was the first time the old man had said extraordinary.
River looked at him with enormous eyes.
"You said it," said River.
"Yes," said the old man.
"Everything is extraordinary," said River.
"Yes," said the old man. "I think that is correct."
Han-Ho made a note.
Old man: said extraordinary. First time. Filed.
He closed the notebook.
Finished his kimbap.
The Dragon Veins pulsed clean energy through the network.
The world did not visibly change.
Not yet.
But underneath everything something that had been blocked for twenty thousand years was flowing again.
And things that flow eventually reach the surface.