The crowd watching the excitement burst into laughter and praised Lu Qiujian's wit, but he was a little regretful that he didn't sing a song about Wu Qianlian's Suture Desire. ◇↓

"Hey!", the man opposite couldn't help it, he blushed and wanted to quarrel with Lu Qiujian; at this time, the Zen master next to him couldn't help it, and quickly tried to persuade him, "Two donors, please don't get angry; what you said

It all makes sense, but everything in this world is like paper, it has two sides, otherwise you can look and see where there is a paper with only the front side but no back side!"

The man opposite assessed Lu Qiujian's height and fighting prowess, and took advantage of the Zen master's persuasion to sit down and mutter, "I'll give Master some face today and I won't argue with you!"

However, Lu Qiujian became interested in this Zen master. It was interesting. He didn't speak many Buddhist scriptures, but he explained the principles using things that could be seen everywhere. It seemed that he had some real ability.

Why don't you tease him? Lu Qiujian rolled his eyes and took out a notebook and asked, "Master, are you saying that there is no paper in the world that only has a front side but no back side?"

"That's true!", the master replied firmly.

Lu Qiujian tore off a piece of paper, twisted one end and glued it to the other end, making a simple Möbius strip. "Master, look, this piece of paper has only one side! If you don't believe it, use a pen."

Draw a line along the paper and the lines will definitely meet!"

"Moebius strip!", the little girl opposite blurted out, "When I was in school, the teacher told me that this strip has only one side!" After saying that, she took out a pen and drew a line in the middle of the paper, and then continued along the paper.

The lines of defense were crossed, and the starting point and end point of the final line met together.

Amitabha meows, I am not angry! The corners of the Zen master's mouth twitched, "Young man, your brain has been filled with fixed opinions, why don't you pour it out and make room for new things? The human brain is just like

Like a bottle, there is always an end. You have to pour out the contents before you can put a new one in!"

"Well, I think the master has a lot of new things in his mind!" He is indeed different from those fake monks who only cheat money. At least there is a clear temperament in his words, "But master, are you sure?

Do all bottles have an end?”

"As long as this is a bottle, it has an inside and an outside. If the inside is open to the end, it will end!" At this time, the master was not as calm as the first time.

Lu Qiujian scribbled on his notebook, and after a while he drew a Klein bottle (actually a Klein bottle is a curved surface that can only be truly expressed in a four-dimensional space. Just take a look here.

), handed it to the Zen master, "Master, what do you think of this bottle? Is there an inside and outside? Is there an end?"

There is a hole at the bottom of this bottle, which extends the neck of the bottle and twists into the inside of the bottle, and then connects to the hole at the bottom. This structure makes the bottle no longer distinguishable from inside to outside, and a fly can fly directly from the inside of the bottle.

to the outside without crossing the surface.

The Zen master's face changed three times when he saw the bottle. He recited the Heart Sutra several times in his mind before he could hold back his anger. He took a deep breath, took the notebook from Lu Qiujian's hand, and drew a picture on it. The picture was of several cylinders.

Holding a wooden board, he put down his pen and said, "Young man, you should not be too angular, sometimes you should be more rounded; you see, only when the wheels work together can the smooth progress of the wooden board they are carrying can be found. You can find shapes with prominent edges and corners.

Also make the plank move forward smoothly?”

"You can have this!" Lu Qiujian replied confidently. Next to the picture drawn by the Zen master, he drew a row of wooden sticks with a Lello triangle in cross-section, and also drew a wooden board to lay on top, "Look like this

If there are edges and corners, the board on top can move forward smoothly without shaking!"

"How is this possible?" asked the Zen Master with a look of disbelief. "How can such a thing prevent the board from shaking? If someone sits on it, it will definitely be damaged!"

"I've seen this thing in a factory!" someone in the crowd watching the excitement spoke. A middle-aged man wearing a uniform from a car factory stood up and said, "This thing is called a Lello triangle. A Lello triangle is a fixed-width curve.

Use it to carry things without shaking up and down. The rotary engine in our factory uses this structure. Compared with the common piston reciprocating engine, the rotary engine has less vibration, high speed, simple structure, and is much better!

"

Amitabha, who is so meowing, is having a hard time with me today! I recited the Heart Sutra silently for n times before the depression in my heart was relieved. I don’t believe that I can’t argue with you today! I rolled my eyes and had an idea again.

The alms bowl was placed on the small table, "Look at my alms bowl, what method would you use to fill it up?"

“It looks like it’s enough to put two pounds of stones in it!”

"Is this enough?"

"There are still gaps between the pebbles. You can put more sand in it!" This is probably because you have to wait until I can't hold anything anymore and advise me to throw away some of the things in my mind? Lu Qiujian guessed.

"Then what? Is it full now?"

"No, it's not full yet. You can pour some more water in!" Lu Qiujian continued to answer!

"Is it full after pouring the water?"

"No, you can also add salt until it is saturated!"

"Have you finished adding the salt? Is it full?" After reciting the Heart Sutra eight times, the Zen master asked this question.

"No, you can also add hydrofluoric acid to dissolve the sand and gravel, evaporate the remaining liquid, then melt it at high temperature, then reduce it to silicon element and make it into a flash memory filled with data!" Lu Qiujian remained calm.

The Zen master finally couldn't bear it anymore. The veins in his hand holding the alms bowl bulged out, and he was about to fall out! At this time, the train just arrived at the station. "I'm home, I don't know the same as you!", the Zen master ran away amidst the laughter.

He also ran down.

When I returned to the temple, I drank eight bowls of herbal tea in a row before I felt better. I called my disciple, "Go and make me a fast wooden sign!"

"Yes, Master, what kind of wooden sign do you want?" the disciple asked obediently.

"Just make it more eye-catching. Let Carpenter Li at the corner of the street do it! He hasn't paid for the incense last time!" The master's memory is very good, "Write seven words on it: Science students are not allowed to enter!"

The master was busy making signs, and Lu Qiujian also arrived at his destination. He put his notebook and dictionary back into his bag, came out of the train station, looked at the strange yet familiar city, and stretched out his hand to stop someone.

Take a taxi, give your home address, and then close your eyes and think about how to get along with your parents in this body after returning home!
Chapter completed!