Odolan is a huge city, but the air in this city is filled with some fog that is hard to tell whether it is pink or purple, which is more serious than the upper layer.

People on this level, regardless of men or women, wear masks or masks, and a few wear gas masks covering their heads.

How to say it, there is a subtle "end of the century" style.

"What is the ratio of time here to the outside world?" Su Qi asked.

"I remember that one month is equal to one year." Yulia glanced at Su Qi, "You don't seem surprised?"

“I have a strong adaptability.”

Su Qi has experienced many changes in time in the world of paradise. The time on the other side can even be compressed to a few hours outside and decades inside.

Of course, the memory of the world over there is relatively vague, and Su Qi can only remember it probably is impossible to compare with the real world.

Moreover, because I have traded with the doll demon, there is no need for the world over there, and Su Qi really doesn't want to go there again.

"The passage here is obviously airtight, but there is still fog."

The passages here are all underground passages, otherwise they are glass cover passages, which are completely isolated from the outside world. But even so, there are still some pink and purple mists on it, but they are slightly lighter than outside.

However, walking here is quite novel.

Odolan does not have cars or other means of transportation, but there are automatic tracks similar to elevators on both sides of the passage, which can move at high speed towards the front.

Although the speed is very fast, the residents of Odolan seem to have adapted to it and walked steadily on it.

"This is the case with this place. It requires multiple purifications before there is a pure place. Generally, wealthy people do this. People on the other hand are like us, wearing a mask or something." Yulia knocked on the mask on her face.

However, after Yulia finished speaking, she thought again: "If we really want to stay here for a long time, we can try it..."

"Eh?" Su Qi was stunned.

"what?"

"I thought we were just here to make extra money."

"Then you can do something private," Yulia hit Su Qi with her elbow. "These mists have an hindrance to the use of magic, but these mists also have some other effects. When the concentration reaches a certain level, the secretion of hormones and dopamine in the body will increase...ah, it's here."

Before Yulia finished speaking, her destination had arrived.

Odolan's Secret Trace Office is a building, which is as high as dozens of floors, but after entering the hall, it feels very empty.

"There are very few people." Su Qi looked around.

"Because everyone has gone to the ruins." A tree man walked slowly from the side. "The ruins appeared here a few days ago? The branch president has already taken people to investigate."

"Ha? So is this?" Yulia pulled the corners of her mouth.

"Don't worry? We are still operating normally. Lord Saint, your laboratory is ready." Shuren said in a slow and slow manner.

"Ah? That's all." Yulia nodded.

Although there are also few people? Shuren quickly arranged a house and laboratory for the two of them.

"call."

After entering the room and put down their luggage, the two of them, who had been tired for a day, finally relaxed.

"Well... it seems that there are quite a lot of jobs here." Su Qi took a look at the app? After the mobile phone was connected to the network here, he could also access the Secret Trail Club intranet here.

Odolan is indeed quite short of people.

Mining is the most lacking in personnel? The second is freight? But the highest reward is the work to the lower level, including but not limited to express delivery, transportation, etc.

"Why is it so easy to make money from the lower level? Hey, you still have to sign a contract? Is it dangerous?" Su Qi took a look.

"Yes." Yulia also began to organize her luggage, "The lower level is very troublesome. Otherwise, what do you think I'm going to test?"

Yulia has taken out a mask.

This is the silent mask to be used for testing later.

It looks similar to Su Qi's face now? But he looked inside the mask? He found that there were many pipes to be installed here.

"I can't speak this, right?" Su Qi was a little surprised.

"Nonsense, if you can speak, it is not called the 'Mask of Silence'. This is specially designed because you can't speak in that place - you will be parasitic."

"……parasitic?"

"Voice cord worm. A special insect, which is usually mist and spreads in the lower layer. Once a sound is made, it will be parasitized? It cannot be defended. The parasite will be gradually invaded by the vocal cord worms and eventually become a puppet of the vocal cord worm? Finally, the puppet will return to the nest of the worm group and become a breeding ground dominated by the insect group." Yulia fiddled with the mask? "The Secret Trace only used a general gas mask when it first entered the lower layer. But she didn't expect the existence of that thing? It suffered huge losses..."

"Once a sound is made, it will be parasitized? It is usually a foggy bug?" It's very strange? But considering that the boundary layer is an extremely strange place, he didn't go into it too much.

"The Secret Trace has also been used in many ways," Yulia said. "At the beginning, it was to let people not speak, mainly relying on personal attention. But we soon found that this method of relying solely on self-discipline was very problematic. Inadvertent sounds, dreams in dreams, and even heavy exhalation may cause vocal cord worms to parasitize. Therefore, the residents of the lower level usually live in super clean huts like shelters, and will never speak when they go out, but even so, many accidents have occurred."

"So later when they entered this poisonous planet, they changed their ideas - it would be better to stop making sounds from the beginning. But the effects of the previous generations could not be said to be very good, so this time I heard that we found a God of Silence, and the secret traces came up and wanted me to have a test..."

Yulia said, looking at Su Qi with malicious intentions.

"So you want to test me?"

"What are you afraid of, I will participate myself." Yulia said, fiddling with the equipment on it: "This is a sound-banning plug, which can block all internal sounds."

"What should I do when communicating?" Su Qi asked.

"Don't worry, the brain wave sensing technology here is very mature. Everyone uses machines to make sound when going out, and I think it's cool to speak without opening your mouth. Have you ever watched anime? Those who don't speak in it are all powerful and invincible guys." Yulia gave a thumbs up.

"Is it okay to use a machine to happen?" Su Qi ignored the second half of the sentence.

"External vocalization units are OK." After Yulia finished checking, she put the mask aside, "But if it is life, whether it is humans, tree people, stone spirits, etc., they will be parasitized. Oh, by the way, the 'vocal cords' I mentioned are actually vocal organs in a broad sense. As long as it is defined as the existence of vocal organs, whether it is vocal cords, whistle, or even roars for sound communication, it is all problematic."

"I want to wear this to go to the lower level?" Su Qi asked again.

"You can catch some extra money along the way." Yulia plucked her hair by the geese.

"But I see here that you have to sign a contract when you go to the lower level." Su Qi looked at the comments on the app.

"Of course, it's dangerous to go to the lower floor. You can't go without signing a contract." Yulia fiddled with the things and threw them beside her, lying on the sofa, "Hurry up and get some extra money, and the rest of the time is our entertainment time. It's rare to come to such an interesting place, you must go to some fun places and delicious food..."

Yulia muttered.

"Can this be eaten?" Su Qi looked at the silent mask.

"The sound-banning plug can be removed and it also has the function of feeding tubes in the wild, but it cannot be removed after the lower layer and can only be used in the upper layer."

"The lower level is so strict?" Su Qi asked.

"We are the official members of the Secret Trail Society. The official path is the strictest. But in fact, some people who go in other ways don't care about the rules or something."

Yulia didn't care about this.

Su Qi and Yulia did not continue chatting. Everyone was tired. After resting for a night, Yulia entered the laboratory and made targeted adjustments to the protective performance of the mask.

After testing this way for several days, Yulia's application to the lower level finally passed the review.

However, it will take some time for the lower level to wait because they still need to customize external equipment.

To go to the lower level, in addition to a mask, more equipment is needed.

Su Qi took this opportunity to visit the museum of the Secret Trace Society and see the history of the pioneering planet of Poisonous Gas.

The heavy equipment here was originally similar to the space suits, which were large and bulky, but in the final development, these clothing gradually became slender, and in recent years, the aesthetics were in terms of appearance.

Odolan was not a middle-level city at first, but the upper level, but with the settlement layer by layer, it has now become a middle-level city. It is said that in another twenty or thirty years, this place may sink to the lower level. But the Secret Trace seems to be studying ways to prevent it from sinking.

"There is actually an armor that can be connected to the eve armor here."

After getting the lower level equipment, Su Qi and Yulia began to change their clothes.

"Of course," Yulia put the equipment she found was still on the bed, then used a magic to temporarily clear the poisonous gas in the room. Then slowly removed the mask, "The secret trail sent out the armor parameters before it. It might be a few weeks for us, but it may have been developed here for several years, so of course it can match it."

After Yulia finished speaking, she put the silent mask on her face, then took the collar and put it on.

"Test, test. Oh... everything is normal, it's over."

Yulia's voice came from the collar on her neck, with a subtle mechanical sound. The silent mask was not much different from the previous mask, but there was a place similar to the lid in the middle of the mask. Special equipment can be used to remove or connect the feeding tube. Compared with the previous gas mask, the difference is mainly reflected in the inside.

"You can really talk." Su Qi looked at Yulia's neck collar.

"You can adapt to this. These devices have built-in application phrases. If you are not suitable for using brain waves, you can directly choose to reply with a preset phrase."

When Yulia spoke before, her mouth inside her mask would move, but now she made a sound, but her mouth didn't move.

"Wait a minute." Su Qi suddenly stopped.

"Hmm?" Yulia looked at Su Qi.

"Well, after this lid is taken off, the two silent masks themselves seem to be able to be connected together."

The crossover structure on the mask made Su Qi think of some slutty operations.

"Uh...ah..."

Yulia was stunned for a moment, then reacted and kicked Su Qi angrily.

"What are you thinking about unhealthy things?!" Yulia seemed to have a very voice, but the collar device seemed unable to express emotions, and could only be a straightforward narration like a stick reading. However, Yulia's angry appearance and her stable voice had a contrasting feeling.

"I mean, if it is connected together through a snorkel, it seems quite romantic." Su Qi quickly followed half of the sentence, "Second breathing or something."

"..." Yulia squinted her eyes and looked at Su Qi, "Why didn't I find out that you are like Su Qi before?"

"Well... it's not too strange, right?"
To be continued...