After the team cooperated and used the navigator, although several crises occurred again, most of them were detected in advance.

Only one detection failure caused the team to fall into a gravitational field trap and almost resulted in losses.

The voyage continued like this for more than half a year, and it was January of the 303rd year of the Recovery Calendar.

[A huge bronze door was found ahead]

Chen An, who was absorbing energy crystals, was startled and immediately pulled out a virtual screen beside him.

The detection of the star network is not very accurate, and the picture appears blurry.

But you can roughly see a rectangular bronze door standing tall and majestic in the starry sky.

[It is estimated that the bronze gate is 100,000 meters high]

"It must be something special. Spread the news to the Star Domain Network."

The other train conductors were alarmed and started discussing.

Some people suggested continuing to approach, but most people preferred to go around it.

"Don't be too curious, or something bad might happen."

"What if there's a key item behind the door? If you miss it, it's gone."

"Someone come and make a prediction, don't just guess blindly."

While they were making a fuss, Chen An had already sent a probe ship closer.

The bronze door is ancient and profound, as if it has experienced countless years, fixed in the starry sky without any movement.

The probe ship observed the surroundings and sent all the details to Fuyao for in-depth analysis.

When the image in the center of the bronze door was enlarged, Chen An was surprised to find that there were twelve keyholes there.

[There are characters on each hole: Zi, Chou, Yin, Mao, Chen...]

Chen An looked at him strangely and asked, "Do you know what these twelve words mean?"

[These are twelve ancient characters that resemble the language of a shaman. They probably have no real meaning.]

Chen An did not explain. He took out the key he had obtained. There was a character "hai" on it, which matched the key perfectly.

"How is it related to Earth? Although there are related texts on Purple Star, there is no comprehensive explanation."

After thinking for a while without any clue, Chen An continued to check the information sent back from the front.

A probe ship farther away discovered that the bronze gate ended a billion kilometers away.

"What does the end mean?"

An insurmountable void appears, and the train cannot enter. Even if it enters, it will be lost and may never get out, until it dies completely.

"Continue probing both sides."

In fact, it is not necessary, because there are already trains that have used the prophet and learned that they must enter the bronze gate and will definitely be able to enter.

However, due to the limitations of the prophecy, they don’t know how to activate it for the time being.

Chen An sent the picture of the keyhole and asked them if anyone had a similar key.

"I have one here."

"I have one too."

"Mine has words on it too. It turns out not every key has words on it."

At last count, there were only nine keys, including Chen An's.

"Don't hide it now, take it out quickly."

"The key isn't a treasure. It will probably become waste after opening the bronze door."

"Who's still reluctant? Annihilation is right behind us."

"I really didn't. I can't possibly make such a joke at this critical moment of life and death."

After half an hour, it was almost certain that all the train conductors had checked their keys.

There was no reason for them to lie, after all, it was a matter of life and death.

There was a thought that made them panic and even terrified.

"Were the other three keys not collected?"

"Who the hell knew a key with inscriptions on it could be used like this? Besides, we only need one key, so if we find it, we won't waste our energy on it. Who cares if it has inscriptions on it or not?"

"I suggest plugging in the existing key first, just in case we can get some extra information!"

Finally, the proposal was adopted, and each of the nine trains sent out a passenger, who flew towards the bronze door with the key in hand.

Without any problems, they inserted all the keys into the holes and turned them clockwise to the bottom.

However, there was no guidance at all. The three holes where the keys were missing emitted a faint light, which made people feel cold in their hearts.

"Everyone, please search the car. Maybe a passenger accidentally took it and didn't turn it in. Or maybe it got mixed up when collecting resources, or maybe it accidentally became a collectible."

All trains began self-inspection, including the Fuyao train.

Chen An asked Fuyao to do a self-examination.

storage, defense, museums, and his own private collection.

And all passengers are given a mandatory task to hand in their keys.

In just ten minutes, more than 100,000 keys were handed in, but none of them were used.

[We have confirmed that there are no special keys on our main and auxiliary trains. They should be in other trains.]

This is very helpless. Chen An cannot deeply inspect other trains and can only observe themselves.

An anxious wait followed.

Although the prophet predicted that the train would definitely pass.

But everyone knows one thing: whenever a prophet predicts the future, it can definitely be changed, although the probability is not high.

In other words, the train was originally sure to pass through the bronze gate, but after the prophet's prediction, the probability of passing may be reduced by 5% or 10%.

Precisely because it would interfere with future progress, Chen An has always been cautious in using prophets.

While waiting, the bored Chen An called Liu Wuhua over and asked her to take a look.

Liu Wuhua said helplessly, "Do you think I'm omnipotent? It's just a door, without any traps or disguises. I can only see through the false and the unknown, but not the truth and the known."

"We have to try!"

What follows is a long wait.

Two hours, four hours, eight hours...

When two days passed, all the train conductors could no longer remain calm.

"What is certain is that the key must have fallen into the Star Palace."

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