Behind the castle was an abyss. It was fifty meters away from the rock on the other side. The depth of the abyss was unpredictable.

Just as Qi Jin arrived near the abyss, he suddenly felt that something was very wrong.

He did not dare to act carelessly. He quickly stopped swimming and extended his finger to carefully feel the changes in his surroundings.

From the tender skin on the tip of his fingers, Qi Jin could not help but be secretly shocked.

After thinking for a moment, he took out an electric light rod from his backpack, folded it twice, and threw it in front of him.

Even if Qi Jin used all of his strength, he could only throw the light stick three meters away. Then, the light rod sank into the abyss below Qi Jin's right hand at a speed visible to the naked eye, and became deeper and deeper in the abyss. It was getting faster and faster, and finally disappeared into the abyss within half a minute.

Qi Jin could not help but inhale a breath of cold air. This place was truly strange, there was actually a hidden underwater current, and it seemed to be extremely powerful, gradually increasing its speed. If one was to enter, wouldn't one be directly pulled into the abyss?

It was hard to say if it would drop, but it had to be verified in all aspects.

's current identity was extremely precious and she was extremely cautious.

He took two steps back and carefully left the abyss.

Seeing that he had returned, Sun Zhao looked over at him with a probing look.

Shaking his head, Qi Jin made a gesture to head upwards. The four of them left the ancient underwater fortress.

After calculating for a bit, it was almost two hours ago. If he didn't go up now, the oxygen tank would issue a warning.

"Pop, pop, pop …"

Four heads popped out of the water.

The three women were pulled up by Qi Jin who had climbed onto the hovercraft first, so Sun Zhao and A Yue could feel a little better.

A Ying laid on the deck, facing upwards. She was extremely exhausted in body and mind, and didn't want to move an inch.

Qi Jin helped A Ying to strip off her diving clothes. A Ying was completely naked but she still looked dispirited. Even the Thorny Green Poison Flower on her body seemed to be on the verge of death.

Grabbing A Ying's right hand, Qi Jin carefully checked her pulse. A moment later, he said to Sun Zhao who was concerned about A Ying: "It's nothing, it's just my energy loss.

Nodding her head, Sun Zhao relaxed and immediately started to settle the scores. She said unhappily: "Hubby, since there's danger, why did you let me enter the hall of the castle?"

It's not that there's danger, it's just a weird experience. If you stand in the hall, when your feet touch the ground, a very domineering force will enter your body, and in that instant, you feel like you are the only ruler of this world. All life in this world is in your hands, so I'll let you experience that unparalleled feeling with your own eyes.

"Is there such a strange feeling?"

Sun Zhao didn't dare believe it, she was extremely suspicious in her heart as she stared at A Ying blankly. She planned to ask her about it in detail after A Ying had completely awakened.

After thinking for a moment, Qi Jin said, "The reason why A Ying's energy consumption was so serious, it is probably related to her equipment. After absorbing oxygen underwater to stimulate her nerves and increase the excitement in her mind, after being tempted by the mysterious power underwater, her excitement had increased by a lot.

"If I go down, will I become like this?"

Sun Zhao rolled her eyes and asked.

"If you go down, the consequences will be even more serious. You have ambition and have once stood at the peak of power, experiencing the benefits of having power. That feeling is even stronger."

Qi Jin frowned, and slowly analyzed.

"Hmph."

Sun Zhao had said more than once that she was ambitious, but Sun Zhao did not agree with her conclusion. In her heart, there was still someone more important than authority: Qi Jin.

With A Yue's help, A Ying drank five bottles of health drink that replenished her body's energy. Only then did she regain her strength and sat up.

Qi Jin turned around to observe A Ying's condition, and his eyes suddenly landed on the Immortal's cave below her.

It was a very deep and luxuriant thatch, showing a neat and triangular shape.

Hurriedly turning his head, Qi Jin took a deep breath to suppress the impulse in his heart. He gave Sun Zhao a meaningful glance and said: "Hurry and get A Ying dressed."

Sun Zhao laughed, and said: "It seems that you are still a gentleman.

"What are you saying? I am a person who has inherited the teachings of a poet. Furthermore, I have received a high level of education. How can I be like an animal?"

Qi Jin said angrily.

Sun Zhao looked at Qi Jin from top to bottom, and then said with a cold smile: "I think you are not a beast, but inferior to a beast."

Of course, Qi Jin knew that "beasts are inferior".

That story, he anxiously tried to defend himself: "Xiao Zhao, if you continue to force me like this, I'll spank your butt."

Sun Zhao made a face that turned pale from fright, pitifully covering her butt: "Wa! "Hubby, I'm afraid you'll spank me. It's so painful, so itchy, and so enjoyable."

Seeing the ridiculing look in her eyes, a warm feeling flowed through Qi Jin's lower abdomen. The man's heroic wind rose, just as she was about to go on a rampage, Sun Zhao chuckled and hid behind A Ying.

It made Qi Jin's teeth itch as he glared at his.

Returning to the research facility, Qi Jin decided to not rely on Sun Zhao. Without any knowledge or experience, Sun Zhao could not help him with the exploration.

Firstly, Qi Jin chose to learn English and German, these two languages were the mainstream languages in Europe.

Being able to speak English and German fluently allowed him to travel everywhere in Europe.

Qi Jin's method of learning was very simple. First, he would memorize every single word of each language that he could find online. There was an abnormal cheating method, a strong memory, and every single word should be engraved into his brain without any problem.

Then, he would practice his pronunciation so that Sun Zhao could correct the parts where his pronunciation was inaccurate.

Three days later, Qi Jin had memorized 30,000 English words, 20,000 German words, and then read the English news. In less than a week, he had memorized these two languages.

Seeing that Qi Jin could speak all the English words fluently, Sun Zhao was speechless. She said in jealousy: "Hubby, I was learning English before, but I used all my strength and studied it for two whole years, and it was even a one-on-one teaching method. I didn't expect you to be able to speak fluent English after a week, sigh! If we are competing in terms of people, we must die. If we are competing in terms of goods, we must throw our goods away. "

"I can learn anything very quickly. As long as I know the trick, it will be very easy."

Qi Jin did not want to use cheating to attack Sun Zhao, that would be too unfair.

After learning English, he immediately surfed the research facility for information, from how to create underwater currents to environments that could affect the human psyche and all sorts of hallucinogenic drugs.

The information asked includes the science and culture of natural science, medicine, dynamics, water quality science, biology, architecture, sensing and so on.

Then, Qi Jin came to a conclusion, "The mysterious power of the underwater castle is probably related to the magnetic field. The magnetic field can be created not only by using magnets, but also by using energy.

There was an obvious force field in the underwater castle. This force field changed the direction of the flowing water and formed a downward pulling force. This pulling force was most likely closely related to the spiritual force in the castle hall.

Afterwards, Qi Jin prepared some equipment and brought Sun Zhao and the others to the underwater fortress again.

This time, Qi Jin only brought Sun Zhao down and allowed him to stay there to receive and support him.

Last time she went down, A Ying confirmed that there were no great dangers underwater and was very confident in letting Sun Zhao down.

As they couldn't dive or strip naked in front of Qi Jin, showing off their beautiful body art, the two girls were a little unhappy.

Sun Zhao wasn't very interested in the underwater world. The reason she was able to enter the ancient castle was entirely due to Qi Jin, and accompanying her husband to explore was already a very exciting thing to do.

Since Qi Jin used a few experimental equipment that were huge in shape, he installed all of the equipment in the small piece of wood's dimension ahead of time. He used the exact same method as during the battle with Pa Gan, which was to transport ammunition.

The M61 machine gun had swept across everything, and it had a direct connection with ammunition.

With such a space, it would also be an extremely wasteful waste to not make use of it.

Sun Zhao had the same heart as Qi Jin, and belonged to the same side as him, so of course Qi Jin wanted to bring her along.

A Ying's relationship with them had drifted apart, so Qi Jin tried his best to avoid revealing his secret to them.

Arriving at the courtyard inside the ancient fortress, Qi Jin took out all the equipment in the small piece of wood space one by one.

Opening up the space requires the help of a black arch.

It was always troublesome.

From the moment the small piece of wood had subdued the double-headed snake monster, Hei Tuo had become Big Brother's rank, commanding the new double-headed snake monster s.

Let the double-headed snake monster help Qi Jin.

The double-headed snake monster used all of its strength to store and take out the equipment.

Maybe there was a system of slavery in the animal kingdom and the human world. The new double-headed snake monster was extremely obedient to the black iron, not daring to defy it at all.

After entering the arborvitae radix, it had evolved into a four-legged monster that was only half a meter long. It looked more like a four-legged lizard with a long tail behind it. It had two heads and a pair of bright eyes, looking like a mini version of the monster.

What made Qi Jin relieved was that the double-headed snake monster did not have any poison. Its strength was stronger than Black Arch, it was more diligent in its work, and it had to obey Qi Jin's orders even more.

As a result, Qi Jin called the majority of the double-headed snake monster over.

Hei Tuo, who had leveled up to Big Brother, calmly assumed the responsibility of overseer, berating double-headed snake monster from time to time.

The newly arrived double-headed snake monster listened to Hei Tuo's scolding with a wooden face, and humbly accepted the leadership.

was secretly amazed.

After Sun Zhao saw the mini version of the double-headed snake monster, she hid behind Qi Jin and pointed at it in fear.

Qi Jin waved his hands, indicating that he was fine, then patted the double-headed snake monster's head and said: "Little Snake Monster, this is my wife. In the future, if you want to fight to the death to protect Sun Zhao, you cannot scare her.

"Yes, Master. I understand. Please be at ease. I dare not offend little Mistress. I'm willing to serve Master until I die."

The double-headed snake monster had already been scolded by Hei Tuo, and the salute was extremely respectful, revealing all of its flattery.

Seeing that the double-headed snake monster did not attack Qi Jin, Sun Zhao gradually became more daring.

The double-headed snake monster was also very obedient and lowered its head as it took the initiative to send the two heads into Sun Zhao's hands. It even moved its head back and forth, rubbing it on Sun Zhao's palms.