Don't go to the moon, there are gods on the far side of the moon.

The west gate of the Aerospace City Exhibition Hall was cleared out before midnight.

This place also receives tourists during the day. The lobby displays an old probe model, the wall shows a photo of the first time humans saw the far side of the moon, and the souvenir counter has refrigerator magnets printed with "Buzhou Mountain Model".

But now, all the lights are off.

Only the underground maintenance passage at the west gate had a temporary red light on.

Lin Jibai knew this place very well.

Even if he can only stay in the toolbox in the main control room now, he can still point out every hidden pipe, every old cable, and every low beam that should have a warning sign but no one has put one on the floor plan based on his maintenance memory.

"There's a cable channel above the third corner, so don't look up too suddenly."

His voice came through the team's headset.

Qin Lan was leading the team.

Lu Chen Gong did not go to the scene. He had just experienced the initial proof of Hou Yi's side, and the broken bow fragments were still cooling. Xu Wang Shu also stayed in the main control cabin, responsible for recording and suspending authority.

The team that went to the site consisted of two space city safety officers, a cryogenic transport robot, and an old Tianheng cryogenic storage box provided by Wen Zhaolin.

Wen Zhaolin himself sat on the edge of the main control cabin, looking at the underground screen of Ximen with a complicated expression.

"This pre-installed point wasn't placed recently," he said.

Xu Wangshu looked at him coldly: "You'd better say something more useful."

"It existed at least before Tianheng took over the renovation of the exhibition hall."

Lin Jibai immediately replied, "That is, when my father was still alive?"

Wen Zhaolin remained silent for a second.

"Maybe even earlier."

This sentence made the air in the main control room sink.

If the embers of Zhu Rong were buried underground in Ximen before Lin Wangchuan disappeared, then it was not a temporary crisis, but part of Lin Wangchuan's manual braking logic, or at least related to the Buzhou Mountain plan.

In the footage, Qin Lan is seen standing in front of an old wall.

The walls are peeling and mottled, and in the corner there is a maintenance mark written by Lin Jibai back then: "Water seepage at the west gate, don't block it."

Lin Jibai suddenly fell silent.

Lin Xiaoman looked at the toolbox.

"elder brother?"

"I wrote this line."

"You remember?"

"I remember," Lin Jibai said in a low voice, "but I don't remember why I wrote 'Don't block it.'"

Xu Wangshu immediately grasped the key point.

"Not just ordinary water seepage?"

"For ordinary leaks, I would write 'Contact the property management,' otherwise I would write 'Don't seal it up.'"

Qin Lan squatted down and shone the light on the base of the wall.

There was indeed a very thin watermark there.

Beside the watermark, a line of dark red ash was hidden. The ash had no temperature, yet it left slight burn marks on the edge of the lens.

The fragments of Nuwa lit up.

The traces of water used to mend the sky coexist with the embers of Zhurong.

[Judgment: The pressure relief joint was artificially preserved.]

Lin Jibai's heart skipped a beat.

"Left by my dad?"

Wen Zhaolin closed his eyes briefly.

"Like his method."

Lin Wangchuan never liked fully automatic shut-off systems. He would leave a manual disconnect point, a pressure relief gap, and a place where an ordinary person could put their hand in for each dangerous system.

The water mark under the West Gate may be the human pressure relief vent during the development of the spark.

Just as Qin Lan was about to take a sample, the wall suddenly turned red.

The ancient, fiery red characters emerged from the ashes.

Fire does not return to its storehouse.

The cryogenic handling robot suddenly went out of control, and the robotic arm reversed and grabbed the storage box.

Xu Wangshu shouted sternly, "Stop!"

The on-site safety officer cut off the robot's power, but the robot was still being dragged by the ashes and crawling into the wall.

Within Lin Xiaoman's dream network, the fiery red arrow suddenly split into dozens of branches, all shooting towards the same spot.

Her face turned pale.

There's something behind the wall!

Qin Lan pulled out her portable cutter and used it to cut open the old wall along the watermarks.

There was no stove behind the wall.

There was only one old copper piece covered by watermarks.

Two characters are engraved on the copper plate.

【Wangchuan】

Lin Jibai's voice suddenly went hoarse.

Qin Lan instructed the on-site safety officer not to touch the copper sheet.

She squatted down in front of the old wall, examining the watermark that had been used to patch the sky. The watermark was narrow, unlike a natural leak; it looked more like a thin crack deliberately left by someone. On the other side of the wall was a spare drainage well from the old exhibition hall, which connected to an abandoned cable trench below. By modern safety standards, this area should have been sealed off long ago.

But it has remained until today.

Lin Jibai stared at the line "Don't block it," and a fragmented thought surfaced in his mind.

That year, he hadn't officially joined the museum's maintenance team yet; he was just temporarily assisting the old foreman. The ground under the west gate was extremely damp, and some people, finding it troublesome, planned to directly fill it with sealant. As he passed by, he casually stopped them, saying that the water didn't smell bad or murky, unlike a typical leak.

The old squad leader scolded him for being nosy.

When no one was looking, he wrote four characters on the wall.

Don't block it.

At that time, he didn't know anything about Zhurong or the watermarks used to mend the sky. He just felt that water could find its own way, and people shouldn't rush to block the way.

The heartbeat inside the toolbox gradually stabilized.

"I remember now," he said.

Lin Xiaoman immediately looked up.

"My dad didn't make me write it."

Everyone was taken aback.

Lin Jibai said softly, "I wrote it myself. But my dad probably knew I would write it like this."

This is more unsettling than simply something left behind by one's father.

Lin Wangchuan didn't give his son all the answers. He simply left the danger in a place where Lin Jibai might discover it, or perhaps instinctively chose to preserve it.

Xu Wangshu said in a low voice, "This is the anchor of humanity."

It's not a grand legacy.

It was a reminder that a repairman had written at the base of a damp wall.

After the copper sheet was discovered, the site was not immediately evacuated.

Qin Lan requested a complete scan of the cavity behind the old wall. The scan results showed that, in addition to the embers of Zhu Rong, there was also a ring of very faint blue mineral deposits around the copper sheet, with a composition similar to the outer edge of the fragments from Nuwa's patching of the sky. In other words, this was not simply hiding fire inside the wall, but rather using the traces of water from patching the sky to leave a buffer layer for the fire so that it wouldn't burn through the human world.

Wen Zhaolin looked at the data, his voice even lower.

"Lin Wangchuan wasn't suppressing the fire back then."

"What are you doing?" Xu Wangshu asked.

"Downgrading the fire."

Wen Zhaolin paused, as if he had finally found a fragment from a gap in his memory.

"Tianheng's early plan was to connect the embers of the fire to the orbital energy grid for a high-energy ignition verification. Lin Wangchuan objected. He said that the spark could not enter the automatic energy chain; there had to be a human brake first."

Upon hearing this, Lin Jibai felt as if something was blocking his throat.

What the father left behind before his disappearance was not a single mystery, but a whole set of human brakes that had been dismantled. Ximen's watermark was just the first piece of the puzzle.

The on-site safety officer took a high-resolution photo of the phrase "Don't block it" and sent it back to the main control room for filing. Lin Jibai looked at his crooked handwriting from his youth and suddenly felt like laughing, but couldn't. It turned out that he had been doing the same thing as his father for a long time: leaving a gap for a person to reach through in places the system couldn't see.

Xu Wangshu highlighted the "artificially preserved pressure relief seam" in red. She knew that this seam would become crucial evidence of the ignition line: fire could exist, but it had to be suppressed by water, someone had to be able to approach it, and someone had to be able to stop it before it got out of control.

The copper plate lit up, and a muffled male voice came out.

"Ji Bai, if Huo wakes up, don't let Hou Yi carry the bow alone."

Before he finished speaking, a second line of text appeared on the back of the copper plate.

One person is missing from the list of candidates to contact the source of the flame.