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

After Luo Xu woke up, she was called to the main control room.

Her expression didn't change when she saw the original document.

This only made everyone more nervous.

"Do you recognize this?" Xu Wangshu asked.

"I recognize it," Luo Xu said. "That's my signature."

"You signed it?"

"I didn't sign it," Luo Xu said. "My signature has been used."

Qin Lan immediately took a picture of the original and enlarged it.

The signature was indeed Luo Xu's handwriting; the strokes, the connected strokes, and the final hook were all exactly the same.

Luo Xu looked at it herself and shook her head.

"This isn't my writing," she said. "It's based on my signature."

How can you be so sure?

"Because my signature tends to tremble when I write it," Luo Xu said. "I have an old injury on my right little finger. This signature doesn't tremble."

Qin Lan retrieved the samples for comparison.

Comparison result: One micro-vibration is missing.

Humans cannot write exactly the same thing, but machines can.

"So someone took your autographed copy and made a replica," Xu Wangshu said.

"Yes," Luo Xu said, "and by copying this person, we can know which documents I've signed."

No one spoke in the main control room.

Because this statement points to a very painful truth.

That person is not just impersonating Luo Xu.

He has Luo Xu's complete signed file.

"When did you find out that you were being impersonated?" Xu Wangshu asked.

Luo Xu thought for a moment.

"Three years ago," she said, "I was reconciling accounts when I found my name on a document that I hadn't signed."

"What is that document?"

"Tianheng's internal handover form," Luo Xu said. "The recipient of the handover is Lu Chenggong."

Lu Chengong looked up.

"It's been three years again."

"Yes," Luo Xu said. "Three years ago, you were registered as a Hou Yi sequence adaptor. Three years ago, I was registered as witness number thirty-one. Three years ago, the ninth fragment was removed from slot thirty-one."

"Three things are one," Xu Wangshu said.

She wrote down the three things side by side, connecting them with a line.

There are two characters written at each end of the line.

[Fill in the blank on my behalf.]

Qin Lan looked at the paper and suddenly said, "This wasn't done by one person."

Why?

"Because to fill in your name, you need to understand the Hou Yi sequence," Qin Lan said. "To fill in Luo Xu's name, you need to understand the Alien Files."

"Those who understand these things must be within the system."

"And it's not just one system," Xu Wangshu said. "The old Heavenly Court knew about the structure, and Tianheng knew about people. There's only one possibility that both sides knew about it."

"What?"

"They've worked together before."

People used to think that the old Heavenly Court and Tianheng were enemies.

One wants to restore order, the other wants to maintain humanity.

It has now been discovered that they sat at the same table at least ten years ago regarding the matter of that group of "witnesses".

"There are forty-six signatures on that original document," Qin Lan said. "I need to check them all."

"Nuclear," Xu Wangshu said, "but the rules need to be changed."

"How should it be changed?"

"You can't just ask the person 'Did you sign this?'" Xu Wangshu said. "You have to ask them 'Was your hand shaking when you wrote your signature?'"

Qin Lan was taken aback.

"This is... using something memorized with the body to check something on paper."

"That's right," Xu Wangshu said. "Paper can be copied, but hands cannot."

That night, the forty-six signatures were checked one by one.

Qin Lan stopped when she reached the ninth test.

"This signature is also problematic."

"Whose?"

Qin Lan turned the original over.

"Lin Wangchuan".

The toolbox in the main control room went off.