After Xi Yao waved her small fist and threatened Chen Yueyuan, she turned around and swam towards Waterdeep's barrier.

Looking at the girl who was in the distance, after gradually becoming only a slender tail left, Chen Yueyuan could only pull Patchy to follow quickly.

It took the three of them about ten minutes to walk through the fields overgrown with golden sea plants and arrive at the official entrance to Waterdeep.

Unlike Grand Rongen and Southern Sacred Cloud City, there is no airship on the bottom of the sea, and naturally there is no harbor, not only that, there is not even a city wall here, and at the edge of the top layer of the 'terrace', there is only a thin layer of translucent shield.

"This is the Klein Protective Film, a special protective layer unique to Waterdeep, which detects whether the creature that touches it is malicious or not, and if it is, you will never be able to enter the protective film."

Xi Yao said as she passed through the protective film and entered it without hindrance, then turned around and said to Chen Yueyuan: "On the contrary, you can come over easily like me, how about it, it's amazing, right?" ”

It is indeed amazing, Chen Yueyuan touched his chin, and muttered a little in his heart, it can detect malicious protective film, and I don't know what the principle is, I definitely won't have bad intentions towards Waterdeep, after all, he is the first time to come here, and Patsy wants to do the same, and it should be able to pass smoothly if nothing else.

Just the name of this protective film...... Somewhat familiar.

Scanning along the edge of this trapezoidal basin, Chen Yueyuan found that the so-called Klein protective film was not the semicircle he had seen before, and there was still a part of the protrusion not far away, a thick tube derived from the protective film, directly inserted into the ground on the outside, and from time to time there would be unknown gases gushing out inside, with a trace of unhealthy black.

"Hey, what are you doing in a daze? Is there a ghost in your heart who is afraid to come in? Xi Yao urged inside: "If you don't come in, I'll call the patrol team to come over!" ”

"Don't worry, we'll come over here."

Chen Yueyuan retracted his gaze and approached the Klein protective film.

Looking at the barrier in front of him, which was as thin as a cicada's wings, Chen Yueyuan took a deep breath, leaned into the ear of Patsy, who had been obediently following him, and said:

"Patty, although we have no ill will towards Waterdeep, this is always the territory of the Deep Sea Clan, and we may have different standards for judging us landers, so to be on the safe side, I'll touch it first, and if anything unusual happens, we'll run back immediately, you know?"

Hearing this, Patchy frowned and thought for a moment, and shook her head slightly.

"What? Isn't it okay? Chen Yueyuan blinked and asked suspiciously.

"Then I'll come first, if this protective film has any countermeasures, you can also preserve your combat effectiveness." Patchy half-covered her mouth and said in Chen Yueyuan's ear:

"Although I am a high-level professional, I have no combat ability, and the water curtain barrier can only be maintained by you, once you are injured and unable to support the barrier, even if we escape to other places, we will not be able to survive for long."

When Chen Yueyuan heard this, he fell into deep thought.

Indeed, what Patchy said is not unreasonable, as the only one of the two who can open the water curtain barrier to obtain air, he is the foundation of survival in the deep sea, so it is the safest way for Patchy to test the Klein protective film.

It's just that letting a girl with little combat power take risks, which makes Chen Yueyuan a little unacceptable, especially after having a good impression of Patsy, he doesn't want to see Patchy get hurt......

But after thinking about it, as Patchy said, if the Klein protective film really launched a counterattack against the landers, then she couldn't escape with Chen Yueyuan after she was hit, but Chen Yueyuan could still resist with Patsy.

It's like fleeing under Ming Yue.

"Okay, then do as you say, be careful." Chen Yueyuan finally nodded and agreed to Patsy's suggestion.

"Hmm."

Patsy's beautiful eyes swept over Chen Yueyuan's hands that were clenched because of nervousness, revealing a hint of a smile, and after giving Chen Yueyuan a reassuring look, she reached out and stretched out her hand to the Klein protective film.

Under Chen Yueyuan's vigilant gaze, Patsy's white and tender palm passed through the protective film as if it had entered a no-man's land, without causing any fluctuations, no different from the scene when Xi Yao entered it.

"Whew~" Patchy breathed a sigh of relief, and the whole person relaxed.

Although she took the initiative to take the lead, she was actually very nervous in her heart, but fortunately, things did not go in a bad direction.

Come to think of it, if you want to come to Waterdeep, you first have to pass through a heavy layer with a water pressure of hundreds of millions of tons, and even a Saint-level professional may not be able to survive it, let alone others.

Therefore, since no landers can come to Waterdeep, there is no need to design a malicious judgment model for landallers.

After Patchy successfully entered the Klein protective film, Chen Yueyuan also passed unharmedly, and the two jumped from the edge of the hollow city of Waterdeep and landed on the first layer of soft ground.

In the moment after entering, Chen Yueyuan felt that the salty smell in his water curtain barrier was gone, replaced by a faint fragrance, a refreshing feeling.

"The water here is different from the one outside the Klein protective film?"

Chen Yueyuan muttered in his heart, stretched out his hand to reach out of the barrier, scooped up a handful of water, and came in to smell it.

In fact, the water curtain barrier made by ordinary water mages cannot produce a large amount of air at the bottom of the sea, unless the barrier is opened before entering the sea to bring the air down from the sea, after all, there is almost no pure air on the bottom of the sea.

The reason why Chen Yueyuan was able to make a water curtain barrier that could accommodate the breathing of two people mainly relied on the scientific knowledge he learned in junior high school - electrolysis of water.

Electrolysis of water can obtain oxygen, this is basic common sense on the earth, although Chen Yueyuan has no electricity after losing his personal terminal and armed mecha, but he has the magic ability to control water!

Water is composed of hydrogen and oxygen, and controlling water is equivalent to controlling hydrogen and oxygen, when the water curtain barrier was first unfolded in the mecha cockpit, Chen Yueyuan subconsciously separated these two elements, and successfully obtained oxygen without exception, plus a little air that originally existed in the seawater, and after mixing together, he and Patsy could breathe freely.

Sure enough, if you learn mathematics, physics and chemistry well, not to mention that you are not afraid to go all over the world, even if you go to another world, you can also play an important role!

Splitting the water element to obtain oxygen is actually not the first scientific experiment Chen Yueyuan has done, as early as when he was fighting against Prady, he used the physical properties of water.

At that time, his consciousness had just returned to Yungu Star from the earth, and he didn't know why his head was particularly bright, and in the face of the silt cocoon that was difficult to break through, he directly changed the arrangement of the water element, so that it condensed into ice and then penetrated and got out of it in one fell swoop......

Thinking of this, Chen Yueyuan suddenly discovered an important thing, after losing contact with Chen Shuang, his intelligence seemed to have improved significantly, whether it was what he did after his consciousness returned to Earth, or when he quickly thought of using the ice gun to break the game against Prady, he had a feeling that his head was running at full power, could it be ...... Chen Shuang actually has his own aura of reducing intelligence?

After thinking carefully about this possibility, Chen Yueyuan's brows became tighter and tighter, every time he was by Chen Shuang's side, he seemed to only subconsciously seek help from Chen Shuang or his personal terminal, this is too abnormal, I am afraid there is a big problem in this!

"I didn't expect you to actually come in."

Without waiting for Chen Yueyuan to dig deep into the secret, Xi Yao swam from the side with a long fishtail swinging, and swam around Chen Yueyuan and Pacy twice, with a hint of strange color in her eyes.

"You still doubted us before." After Chen Yueyuan heard Xi Yao's words, she could only temporarily put aside the explanation of whether Chen Shuang's existence would affect her intelligence, and replied angrily.

"Anyway, you are all land people, of course we deep sea clans should be more vigilant."

Facing Chen Yueyuan's slightly dissatisfied eyes, Xi Yao waved her hand indifferently: "Besides, you were so skilled at deceiving the patrol just now, people are a little unsure of what you are about!" ”

"Are you sure now?"

"Ninety percent of the time, you've passed the Klein protective film test, and you have to report to the Personnel Management Center, which is the key to deciding whether you can stay in Waterdeep for the time being."

"What does a people management center do?"

The shark-fin deep-sea clan Luo Ken, who was almost lame by Chen Yueyuan, had also mentioned before that he asked Chen Yueyuan to report to the center, and he didn't know what form this so-called report was.

"The personnel management center is an organization that specializes in counting the information of people living in Waterdeep, whether they are settled or temporarily residing, they must go there to report, otherwise once they are found to be 'black households', they will be expelled from Waterdeep and put on the blacklist, and they will be given the death penalty."

"Oh, isn't this something like a temporary residence permit......" Chen Yueyuan nodded, indicating that he knew.

"Then I'll take you to the personnel management center first." Xi Yao easily found a direction and said: "There are five personnel management centers in Waterdeep, which are located on the 100th floor, 200th floor, 300th floor, 400th floor, and 500th floor. ”

"The position we are on now is the first floor, and the lower the floor, the higher the number of floors, the smaller the area, and the bottom is the thousandth floor, which is also where the barb meets the ground."

As Xi Yao made her way to her destination, she introduced the basic situation of this deep-sea city to Chen Yueyuan and Patsy.

Because Waterdeep is a city of the Deep Sea Clan, every place is full of seawater, so there is no need to build stairs to go down at all, everyone uses it conveniently and quickly, which makes Chen Yueyuan's Pache bitter, and the two can only keep jumping down.

Fortunately, the height of each layer is only four meters, and the water curtain barrier can also be buoyant, and it will not be too tiring to jump a hundred floors, mainly because the width of each layer has to walk for dozens of minutes......

After a long time, the three of them finally arrived at the hundredth floor of Waterdeep's 'terraces'......