Starting as a Wallfacer, his defection to the Three-Body Problem shocked the world.

Luo Ji did not go to find Lin Xuan. On the way, he was stopped by Taylor.

"Surprised, isn't it? PDC actually sent me to find you."

Taylor's attire at this moment made it impossible to tell that he was a Wallfacer.

Unlike when he first became a Wallfacer a few years ago, he now wears a white shirt and short sleeves, a straw hat on his head, and a bamboo basket hanging from his waist, filled with tomatoes, all grown in his field.

He was dressed exactly like a farmer.

"Would you like some? They're so fresh, just picked from the field."

Taylor picked up a tomato and handed it to Luo Ji.

“I thought the PDC had forgotten about me, the Wallfacer, but then Chairman Sai suddenly contacted me this morning and asked me to pass on a few words to you.”

Luo Ji frowned slightly.

"What?"

"They say your wife has gone into hibernation."

“I know that. They kidnapped Zhuang Yan, and I’m going to settle the score with them.”

Taylor shook his head.

"No, let me finish. Zhuang Yan applied to go into hibernation herself."

As Taylor spoke, she retrieved a hibernation application form on her tablet and showed it to Luo Ji.

"See that? The application date is three months ago. She was already preparing to hibernate three months ago!"

Luo Ji was taken aback, then he began to recall.

Indeed, Zhuang Yan seemed to have become taciturn about three months ago. It turned out that she had already prepared to leave him back then.

But Luo Ji quickly realized the problem.

"Is she...from PDC?"

This was the last question in Luo Ji's mind: if Zhuang Yan's appearance was arranged by the PDC from the beginning, then wouldn't all his interactions with her over the past few years have been fake?

"I really don't know that."

Taylor shook his head slightly.

“But Dr. Luo Ji, I am a married man, and I have more experience in this area than you do. No one can ever pretend to love someone for years. You should know better than me whether Ms. Zhuang Yan’s love for you is genuine.”

Luo Ji remained silent for a long time before speaking.

What does PDC need me to do?

"Do what you're supposed to do."

"You and I are both Wallfacers, and we should fight for all of humanity. But unfortunately, I am not skilled enough to complete my mission. This task will be handed over to you and Lin Xuan. You two are the last hope for the Wallfacer Project."

Upon hearing this, Luo Ji seemed somewhat agitated, perhaps because of Zhuang Yan's departure.

"A mission to fight for humanity?"

"What a joke. I've already said, I'm just an ordinary person. Compared to Lin Xuan, I don't have his creativity in controlling the overall situation. Compared to Radiaz, I don't have his courage to go all in. Compared to Hines, I don't have his talent in neuroscience."

“Mr. Taylor, you say you are not very learned, but compared to you, don’t I seem even more ordinary?”

Taylor shook his head.

"This is the second message PDC asked me to convey to you."

"They said that two of the original five Wallfacers were special."

"One is you, and the other is Lin Xuan."

"When Project Guzheng ended, PDC intercepted a large amount of data from ETO, including conversations between the Trisolarans and ETO's former leader, Evans. Two of these conversations were about the two of you."

"First, assassinate Luo Ji, but avoid attracting the attention of others."

"Secondly, try to win over Lin Xuan. If appropriate, you can reveal some information to him."

The two Wallfacers are a person the Trisolarans must kill, and a person the Trisolarans want to win over.

That's why they became the fourth and fifth Wallfacers appointed by the PDC.

"It's obvious, he's here to assassinate Luo Ji!"

Luo Ji suddenly recalled Lin Xuan's words.

At that time, he and Lin Xuan had just become Wallfacers when they were assassinated by ETO. If Lin Xuan hadn't reacted quickly, he would have been the one shot.

"But...why?"

Luo Ji didn't understand.

Why would ETO assassinate him?

"That's a question you'll have to ask yourself, Dr. Luo Ji. You have to be your own wall-breaker."

Luo Ji fell silent. He began to try to recall the first half of his life, filtering out fragments of his chaotic memories one by one.

Ultimately, the focus shifted to a conversation.

That was his conversation with Ye Wenjie, the first leader of ETO.

"I have a suggestion: why don't you study cosmic sociology?"

"Cosmic Sociology?"

"A term I'm just mentioning is the assumption that there are a huge number of civilizations distributed throughout the universe, their number being on the same order of magnitude as the number of observable stars, a great many. These civilizations constitute a total cosmic society, and cosmic sociology studies the form of this super-society."

Luo Ji's reaction at the time was one of shock, after all, in his understanding at the time, their civilization was the only one that existed in the entire universe.

Then, Ye Wenjie presented Luo Ji with two self-evident axioms.

First, survival is the primary need of civilization; second, civilization continues to grow and expand, but the total amount of matter in the universe remains constant.

There are also two important concepts: the chain of suspicion and the technology explosion.

Luo Ji didn't understand the meaning of Ye Wenjie's words at the time, but considering the current situation, he felt that the reason why ETO wanted to kill him was likely hidden in this.

Ye Wenjie is Yang Dong's mother, and she has some connections with both Wang Miao and Ding Yi. Compared to herself, this academic fraudster, those two are much smarter.

He was just Yang Dong's classmate, and he went to her grave to pay his respects after Yang Dong's death.

But Ye Wenjie chose to talk to her, and it's unclear whether she was moved by seeing her daughter's good friend or if it was intentional.

At that time, Luo Ji was not yet a Wallfacer, nor did he know that Ye Wenjie was the leader of ETO.

So he didn't realize the meaning behind her words, but he thought that the information contained in those words might be greater than he imagined.

"Thank you."

Luo Ji took the tomato Taylor handed him, took a big bite, and the red juice burst out. He seemed to be trying to concentrate all his thoughts on one point.

"I need to meet with Lin Xuan and talk to him to help me contact PDC."

"No, I'm here."

Luo Ji and Taylor turned their heads at the same time and saw a familiar figure walking towards them in the distance.

"You guys chat, I'll go cook."

Taylor patted Luo Ji on the shoulder and then turned and left.

At midday, when the sun was high in the sky, Luo Ji and Lin Xuan stood on the golden grass, looking towards the distant forest.

After a long while, Luo Ji finally spoke his first words.

"I plan to try studying cosmic sociology because..."

Lin Xuan suddenly reached out and interrupted Luo Ji, who then suddenly remembered that Zhi Zi was constantly monitoring them.

"Do what you want. I've entrusted Luo Congmin to Zhang Beihai's family. She's safe."

"Thank you."

"No need to thank me. You should take responsibility so that at least when Minmin grows up, I can tell her what kind of person her father is."