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They found a total of six rooms on the eight walls. Except for the Qian Gua wall which was covered with formulas, the Xun Gua wall had collapsed and was completely inaccessible.

What relieved Yu Hongdou was that only four of the six rooms had ever been lived in, and two of them looked more like places where native locals lived.

Yu Hongdou speculated whether the two "local households" might be Cao Yun and Xu Maoling, but these two local households left too few clues.

"There is no door to exit." Everyone gathered in the middle hall again, and Yu Song announced the news with some heaviness.

"I must have overlooked something." Mo Shougui thought hard and felt that this was not right.

Yu Hongdou held the black notebook and slowly opened it. On the first page, Fan Sheng introduced his origins, and on the second page he talked about his impressions when he first arrived in this world.

As a modern person, there are few who are not curious about time travel. He went from being confused to being excited, and then from being excited to being shocked. He began to miss the modern times and wanted to go home.

Although the handwriting was short, Yu Hongdou saw all kinds of entanglements and struggles in it.

The third page shows how he was chosen by the Hat Fairy. Here Fan Sheng said, "Everything is destined and premeditated."

He did not explain this sentence in detail, but this sentence made Yu Hongdou think about it carefully and feel terrified.

She didn't dare to follow her own thoughts and was anxious to turn to the next page, wanting to know if the fellow villager had any detailed explanation.

However, the next page was beyond her expectations.

"Torn?" Tan Yanlin stood next to Yu Hongdou and observed her for a long time. He suspected that she understood the words on the black leather notebook, but he was not sure.

When he saw the torn pages in the notebook, he couldn't help but exclaim in surprise.

Yu Hongdou raised her head woodenly, still in a trance, and responded with a "hmm" reflexively.

Tan Yanlin noticed her distraction and frowned slightly, then let go and stroked the notebook page with his fingers: "I don't think these words are written with a brush. Maybe we can try rubbing them."

"Ah? Oh! Yes." Yu Hongdou was stunned for a moment before she reacted.

Looking at the notebook in her hand, she suddenly realized that the handwriting she had been looking at was not written with a brush. After all, writing pinyin with a brush would probably be very tiring.

She pulled out a stick of charcoal from her pocket and began to apply it lightly on the paper at an angle.

[I knew you would do this.]

As soon as these words came out, Yu Hongdou was so scared that he dropped the charcoal stick in his hand.

For almost a moment, Yu Hongdou felt as if the notebook came alive and was talking to her.

[Don't be afraid, I don't mean to scare you, it's just...how should I put it, I feel a little complicated. ]

These two sentences were in simplified Chinese. Tan Yanlin half understood them. He picked up the charcoal stick, continued Yu Hongdou's actions, and began to slowly paint the entire piece of paper.

There are only a few words below:

【I was chosen.】

【He said, as long as I find that thing, I can go home. 】

【I miss home, I want to go find it. 】

The amount of information in these three sentences was enough for Yu Hongdou to string things together in his mind.

What made her shudder was the last sentence.

【I have spent half my life but I still haven’t found it. 】

The handwriting of this sentence was very sloppy, and it had a more inexplicable vicissitudes and sadness than the previous sentences.

Whenever Yu Hongdou thought about how the other person felt when he wrote these words, she felt uncomfortable.

Not everyone can stay safely in a strange world and a strange era. Even someone as indifferent to family affection as her will often think of her past life.

It would be a terrible thing for a person who was originally happy or had worries to travel to another world overnight, with all his relatives and friends gone and unable to contact them or vent.

The ecstasy of time travel is probably something that only middle school kids and those who have no worries and want to escape from the mundane world can accept calmly.

However, what is more terrifying than the act of traveling through time and space to survive is that someone gave him a glimmer of hope and told him that he could go back.

He worked hard for half his life, only to find out in the end that he couldn't go back...

Yu Hongdou felt that if it were her, she would probably go crazy and collapse.

"So he is the one above?" Tan Yanlin was puzzled and connected the owner of the black leather notebook with the person in the humanoid sarcophagus above.

"Not necessarily." Yu Hongdou shook her head. She wasn't sure, but the feeling in her heart told her that it probably wasn't the case.

If she were the owner of the notebook and found that her hope had turned into despair, she would never have anything to do with things like the "Hat Fairy" again.

Even if she died, she would not want to die around the "Hat Fairy".

The back of the black leather notebook was completely blank. Yu Hongdou lost interest, put the notebook away, and stared blankly at the wall covered with formulas with her chin resting on her hand.

This fellow is really miserable. He is a young man who is full of vigor and vitality and has not yet suffered the beatings of society. He traveled through time and space before his heroic deeds were accomplished.

Unable to adapt to this world, he was chosen by the Hat Fairy and embarked on a life of searching for half his life for an illusory promise...

Tragic, too tragic.

Yu Hongdou shuddered at the thought, and her impression of the Hat Fairy plummeted.

"What are they looking for?" Tan Yanlin asked himself, "Is it related to turning stone into gold? Or is it that the hat fairy's hat is damaged and they are looking for materials to repair it?"

Yu Hongdou was stunned by Tan Yanlin's inference. Is this kid's brain working too fast?

Yu Hongdou knew what the Hat Fairy was looking for.

They should be looking for the power stone.

Yu Hongdou scanned the formulas on the wall with regret and sadness. These were all the efforts made by this fellow villager to return home. She thought it would be great if she could help him. Anyway, she didn't want to...

Hmm? Yu Hongdou stared at the short, seemingly nonsensical formula at the base of the wall, her mind working frantically.

M + 4 Fe

Assume that the door represents "M", the action of opening the door represents "+", and the action of closing the door represents "-".

The strength of the door is expressed by numbers (1 - 10, 10 being the strongest), and the chemical element symbol "Fe" is used to represent iron doors.

So M + 4 Fe means opening an iron door with a strength of 4?

Yu Hongdou suddenly stood up and looked around. Everyone was quietly frowning. Her action immediately attracted everyone's attention.

"Have you seen anything made of iron?" Yu Hongdou was stunned as soon as she asked this question. She glanced sideways downward and her eyes fell on the middle of the circular hall.

There, corresponding to the entrance above, there is a square floor tile laid.

None of them noticed just now that this floor tile was actually made of iron.

"So, the exit is right in front of us?"

We were wandering around like headless flies for a long time, and Yu Hongdou severely dissed himself and his friends for being stupid.