Gao Wu: I am invincible now that I have connected to the Immortal Gate.

The students were very excited.

"In today's monster class, we won't talk about the content of the class. I'll ask you a question first. Why do you think humans practice martial arts?"

Professor Luo looked around the freshmen and pointed to a student, asking him to answer.

The boy stood up and responded, "Humans practice martial arts to fight monsters and protect their homes!"

"Then why do humans choose martial arts instead of developing technology?"

Professor Luo's question stunned everyone. The male student who answered the question hesitated for a few seconds, "Because humans' original thermal weapons are useless against monsters, and the effect is minimal!"

Professor Luo nodded and asked again, "Then why are humans' original technological thermal weapons useless against monsters?"

This time the boy couldn't answer, and most people in the classroom fell into a thoughtful expression.

Qi Feng heard Lei Batian muttering beside him, "Who knows this? No one has taught me..."

Yes, no one has taught me.

In other words, from childhood to adulthood, these people have been instilled with the idea that hot weapons cannot deal with monsters, and that martial arts are the only way to fight monsters.

They only know that hot weapons are useless against monsters, but they don't know why hot weapons are useless against monsters.

"Because the world dimensions are different!"

Qi Feng answered in his heart, and at the same time, his mind appeared in the various experiences of entering the Zhenwu world after dreaming, as well as the differences between cultivators and martial artists.

"Because the world dimensions are different!"

Professor Luo raised his voice at this time, "Humans have been fighting monsters for more than 300 years, and so far, they have never stopped exploring and studying the origin of monsters."

"Although we haven't got the answer yet, one thing is certain!"

After Professor Luo finished speaking, he turned around and wrote a few keywords on the blackboard with chalk: different world, different space!

"These monsters come from another world or another space."

"They are even creatures from another dimension. It is not clear why they invade us. Maybe it is just the instinct of aggression, or maybe it is for other reasons..."

"It is precisely because of their origin and the characteristics they carry that our thermal weapons are ineffective. Next, I will show you a video."

Professor Luo turned on the projector in the classroom, connected it to the storage disk he brought, and then started playing a video.

The video was a battle between humans and monsters. Fierce and intensive firepower covered and hit those monsters without causing any damage.

"This is a precious video from before the first year of martial arts..."

Professor Luo put his hands on the podium, scanned the audience, and said calmly, "Now, do you know what dimensionality reduction is?!"

The whole classroom was silent, and all the freshmen were silent.

At this time, some parts of their worldview were collapsing and quietly rebuilding.

Qi Feng couldn't help but sigh in his heart. The performance of these people was exactly the same as his performance after he learned the truth.

Thinking back to the time when he encountered the beast tide in Yunmeng District of Dahuangzhou, he saw with his own eyes that those modern hot weapons had no effect on high-level monsters.

"Students, you must remember that it is not us who chose martial arts, but martial arts that chose us!"

"If we want to survive the invasion of monsters, we can only rely on the power of martial arts!"

Professor Luo put down the chalk and sighed softly, "This is the lesson I will teach you today. I hope it can help you choose cold weapons as your major and your future martial arts path a little bit!"

"get out of class dismissed!"

As soon as Professor Luo finished speaking, the bell for the end of get out of class rang.

Professor Luo nodded, turned around and left, and the classroom was dead silent.

Everyone was immersed in what Professor Luo said, and was shocked and shocked, and could not calm down for a long time.

A few minutes later, the classroom became noisy.

"If the monster invasion is really just a group of unconscious insects that strayed into the lower world, this is not impossible!"

"If high-dimensional creatures invade the lower-dimensional world, an ant can also destroy the world!"

"If the origin of the human crisis comes from an insect, then the cause of human extinction will not be the invasion of real intelligent creatures from another world..."

Qi Feng listened to the discussion of the crowd, and a picture gradually popped up in his mind.

An ordinary person stood in front of an anthill. He sprinkled some water, which became a flood of destruction in the eyes of the ants.

He threw down a few stones, which looked like meteorites falling from the sky to the ants.

In fact, the gap between high-dimensional and low-dimensional worlds is much greater than this.

"If it is true that intelligent creatures of higher dimensions accidentally discovered our small paper world, and became interested in it, and began to throw things into it for fun, and even took action in the end..."

"Then the fall of human civilization is entirely possible, and the difficulty of saving human civilization will be far beyond my imagination..."

At this moment, Qi Feng thought a lot, and many confusions arose in his heart.

The short break between classes ended quickly, and a man who looked to be in his twenties walked into the classroom and went straight to the podium.

"My name is Xiao Yan, and I am the chief counselor in charge of your freshmen."

"I am sorry that I have met you for the first time after so long since the start of school, mainly because of some other things that delayed me..."

Qi Feng looked at Xiao Yan standing on the podium and smelled a faint smell of blood and wound medicine on him.

He remembered that on the day of the entrance ceremony, the position of the chief counselor on the rostrum was indeed empty, but the position was relatively remote, and no one noticed it at all.

"It's not too late, after all, cold weapons are what you major in for four years in college. You can always come to me if you have any questions. Please remember my phone number..."

The young man Xiao Yan wrote a string of numbers on the blackboard, and then enlarged some pictures on the screen through the projection screen.

These are some pictures of cold weapons, including eighteen kinds of weapons and knives, and some new cold weapons that Qi Feng had never heard of.

There is also a long text description under each cold weapon picture.

Xiao Yan said calmly, "Next, I will briefly explain the advantages and disadvantages of each cold weapon."

"During this time, you can combine what Professor Luo said in the last class with your own talents and preferences to decide what type of cold weapon you want to major in."

"You must report your decision to me before the end of get out of class, and then you will have three days of trial classes."

"During these three days, if you feel that you are not suitable for this weapon, you can ask me to change it at any time.

In short, during these three days, you can take any cold weapon class at will, but after three days, if you want to change it..."

Having said this, Xiao Yan paused, "It's not impossible, it's just very troublesome, and I don't recommend you to do this."

"Okay, next I will start from the first cold weapon to introduce to you..."

Xiao Yan explained the knowledge of each cold weapon to the freshmen below one by one according to the pictures and videos.