"Pervert!" Su Manman saw Tian Hong staring at her, scolded angrily in a low voice, and stopped paying attention to Tian Hong.

After Tian Hong came to his senses, he didn't speak, and began to fiddle with the stones and rotten wood in his hands.

Soon it was time for recess, and the art teacher walked away happily with rice paper in one hand and some odds and ends in the other.

"Tian Hong, what are you doing?"

Tian Hong fiddling with the stones and rotten wood quickly attracted the attention of many classmates, however, Tian Hong was usually silent, and no one asked about it, only Yang Feng asked because of his relationship with Tian Hong.

"It's like a perpetual motion machine, and as long as you don't break its structure, you can run forever......"

Tian Hong concentrated, held his breath, put the last stone on the desk, a small and simple formation was finally placed, this is a "rejection formation", Tian Hong only knows a little about the surface, at most he can only put on such a large small circle, and it cannot play a role in the actual battle.

In fact, the rejecting array was the most frequently used formation in ancient times, because it could not be moved, so most of them were used at the city gate as a defense, which is why most of the ancient city gates were made of wood and stone.

It is worth mentioning that although the purpose of this rejection array is not very large, but the arrangement is very complicated, the distance and angle between the stone and the wood are very particular, and the distance and angle will be changed at any time because of the change in the size of the stone and wood, which is also a huge calculation process, so in the Sui Dynasty, there will be a special mechanism for setting up the rejection array......

"Perpetual motion machine ......" Yang Feng looked at the almost rotten wood and stones on the table with a look of disbelief.

"Haha...... Tian Hong, are you sick yet, a few pieces of stone and wood are also said to be perpetual motion machines. Zhang Dali sneered.

"It's not a perpetual motion machine, but it's similar to a perpetual motion machine, which can provide an invisible power forever, for example, inside the stone and wood is a forbidden space, and nothing outside can enter it......"

Tian Hong said as he put a piece of white paper from the top of the stone and wood, and the paper began to fall, but it seemed that there was a layer of transparent glass below to block the paper from falling, fluttering, and finally, the paper fell outside the staggered space composed of stone and wood.

"Wow...... Really......" Everyone was amazed.

Immediately, there were many people who experimented with putting all sorts of things into the circle, but once they entered the circle, they slipped out of the circle as if they were blocked by a transparent glass wall.

The students were all amazed, it was amazing!

"Hmph, it's just magic, it's really a perpetual motion machine...... Huh...... "After all, Su Manman's curiosity overweighed his contempt for Tian Hong, and he bent over and looked down to carefully observe the seemingly unremarkable little circle.

The construction of the small circle is simple, with some stones and wood mixed together to form a chaotic irregular circle.

Su Manman's disdain gradually turned into surprise, because she couldn't insert a pen into the space above the small circle, as if the pen was blocked by an invisible wall.

Around this small formation, there was a crowd of people, and people couldn't figure out what this little thing was.

"Tian Hong, how did you get this? Can you teach me? Su Manman said excitedly.

"Secret." Tian Hong shook his head, this is a secret related to their Li family, so naturally they can't say it casually.

"Hmph, it's amazing for you, isn't it just a trick, what's the big deal!" Su Manman pursed her mouth and pretended not to care, but her eyes were fixed on the small formation, and everyone could see that she was full of interest in this thing.

"Hey, isn't this just a little magic, I know, outside, there is a cover made of special materials, see me break this carving insect technique......" The young man who had been following Su Manman all day squeezed in, and without saying a word, he punched the formation.

"Don't ......!"

Tian Hong was shocked when he saw that the young man suddenly punched the rejection formation, and suddenly stood up and tried to stop it, but unfortunately, it was too late!

"Peng!"

There was a low muffled sound, a series of falling sounds of "ordinary" and "ordinary", and the people standing around the rejection array were pushed away by a surging force, and the people standing behind also fell to the ground because of the heavy pressure of the people in front, and suddenly became a mess......

"What are you doing?" A rather majestic voice rang out.

I don't know when, the physics teacher has already walked in with the textbook, and a group of students are scrambling to get up, but fortunately no one is hurt.

Where do you know, this is the side effect of the rejection array, in ancient wars, it often happened that the city gate was broken and the city tower collapsed, in fact, it was the chain reaction caused by the rejection of the army being breached.

Although the rejection array is strong, the external force can also be broken, the difference is that after the breakthrough, there will be the side effect of burning jade, generally speaking, when the rejection array is broken, that is, when the city is broken......

"Can anyone tell me why?" The physics teacher was short, but a little vicious, and his small eyes patrolled dozens of students who were palpitating.

"Hu ...... Teacher Hu...... It was Tian Hong who played magic tricks...... "The young man who hit the rejecting formation with his fist was stunned, his face showed a look of fear, just now he felt it the deepest, his hand, there was a feeling of broken bones.

"Magic! What magic is such a big reaction? The physics teacher was suspicious.

"No, respected teacher, it's not magic, it's a structure similar to a perpetual motion machine, and it was destroyed by this classmate, which caused the consequences just now." Tian Hong wiped the sweat on his face, fortunately, this rejection array was just some bits and pieces that he was looking for, if he could find suitable wood and stones, it was estimated that there would be casualties.

In the past, Tian Hong didn't pay attention to the function of the formation, and when he was killing with the eighteen-way anti-king, any formation was like paper paste in front of him, not to mention this rejection array, under his double hammer, at least dozens of city walls with rejection arrays were destroyed.

The time I was really interested in the formation was after capturing Black Impermanence with the Golden Stone Giant Wood Formation.

Now that his body is broken and his soul is weak, if he can make more use of the formation, he will also have the strength to fight when he encounters the ghost soldiers and ghost generals of the Yin Tianzi.

"Perpetual motion machine...... Ahem...... Field...... Tian Hong, Mo Fei, do you think that a perpetual motion machine really exists" The physics teacher obviously knew Tian Hong, and after coughing a few times, he was not as rough as he was with other students.

"Yes, everything in nature can form an existence similar to a perpetual motion machine, but we don't know the method, for example, just now I used stones to arrange a small energy circulation system, which can produce the effect of rejecting external forces......"

"Tian Hong just arranged a perpetual motion machine?" The physics teacher smiled slightly, hiding the disdain in his heart.

"Mr. Hu, we think it was just a magic trick just now."

"Yes, countless scientific experiments have proved that perpetual motion machines cannot exist."

"Yes, yes, I think it's magic......"

……

Immediately, a group of students spoke enthusiastically, but they didn't think that Tian Hong's formation just now was an existence similar to a perpetual motion machine.

"Classmate Tian Hong, what did you do just now? Can I do it again? Seeing that a group of students were very interested, the physics teacher couldn't help but ask curiously.

"Absolutely." Tian Hong bent down and looked at the stones and wooden blocks that had just been scattered on the ground.

"Classmate Tian Hong, I personally think that in order to prove that the circle you just now is not magic, you should give up the stones and wood you brought yourself." Su Manman stood up and said with a smug expression.

"Of course, who wants to help me pick up a few stones and wood, branches are fine, but they must be branches that are not rotten, and stones of a certain hardness, in order to avoid accidents, stones and wood do not need to be too ......"

"I'll pick it up!"

The teenager who had begun to box, volunteered, ran out in a puff of smoke, and soon came in with a handful of stones and branches in his hand and put them on the podium.

"I asked Tian Hong to arrange a perpetual motion machine for us." The physics teacher smiled, but anyone could see the mockery.

Tian Hong didn't speak, and strode to the podium.

When Tian Hong walked up, the classroom suddenly fell into extreme silence again, and the students almost immediately thought of Tian Hong's performance in the previous class.

Looking at the serious expression and firm steps, inexplicably, many students had a confidence in Tian Hongsheng that they had never had before.

Perhaps, this Tian Hong can really create a miracle!

……

ps: The little overlord had a fever of 38.8 degrees, and the old overlord had a cold, and he was weak, and he held on to the code word for a chapter......