It's better to act than to act. Starting the next day, the three boys in the dormitory immediately split up.

Pang Zi and Huang Jie were responsible for collecting empty drink bottles, while Yao Yayao went to the commissary to buy paper cutters, transparent tape, pull rulers, thermometers and other items, and went to the garbage heap to collect some thicker ordinary cardboard boxes.

Today is only the second day of school, and the campus is flooded with express items, and all kinds of outer packaging cartons are everywhere. Yao Yayao easily collected the hard cardboard box he wanted.

Since the school has just started and there are no formal classes, except for some extracurricular activities such as opening ceremonies and team assemblies, the three of them have a lot of free time to do what they want to do.

Pang Zi and Huang Jie's assignment was also completed smoothly, and they collected a lot of empty plastic drink bottles. There are countless such empty bottles in the garbage heap under each student dormitory. Those college students who love sports will fill at least a few bottles of Coke soda every day.

According to Yao Yayao's request, they divided each bottle into two from the middle. Half of the bottle with the spout is left behind, and the other half of the bottom is discarded. All caps are also discarded.

Yao Yayao used a ruler to measure the size of each dormitory's own balcony door, as well as the size of each flat-sliding aluminum alloy window. Next, the cardboard boxes were spread out and various adhesive tapes were combined to make the corresponding dimensions of doors and windows of the same size.

Next, multiple rows of equidistant small round holes were dug on the cardboard box, and some translucent square holes were reserved and sealed on both sides with transparent tape.

And the last step is to put those half-empty plastic bottles, with the spout facing indoors, and stuff them into those dense small holes, and you're done.

The final result is visually similar to a large beehive. Countless open horns seem to be waiting and welcoming the homecoming bees.

"Yayao, can such a simple thing really have the effect of air conditioning?!" Looking at the final results, the specially constructed doors and windows of several cardboard box balconies, Pang Zi and Huang Jie were a little skeptical.

"Isn't there a final answer if you hang it up?!" Yao Yayao was also a little apprehensive in his heart. This idea of his work was made according to some introductions in a foreign scientific data document, and it was also the first time to do it. As for whether there is any practical effect, Yao Yayao's heart is indeed bottomless.

So, the three of them removed the balcony doors and aluminum alloy windows in the dormitory, and then replaced them with special doors and windows made by themselves. And with transparent glue, nails and small ropes and so on to do the fixing and sealing of the window seams.

Then, it's time to stare at the thermometer in the room to see how it works.

They were not disappointed, because the miracle really happened slowly. Soon after, the small column of mercury in the room thermometer slowly fell.

Especially when the wind blows outside, you can clearly feel the cool wind coming from the mouths of many small plastic bottles. If you place your hand near the mouth of the bottle, the effect is even more pronounced. Sure enough, there were constant gusts of cold wind.

An hour later, the three of them were surprised to see that the room thermometer, which had been showing 31 degrees, had dropped to around 27 degrees. This temperature is already very comfortable for the human body. Pang Zi no longer has to keep fanning himself with a big magazine.

All three of them were very happy and very happy. There's an old saying about it? It's really do-it-yourself, and you have plenty of food and clothing! This feeling of self-sufficiency is so refreshing!

In fact, the strange and noisy manual work in their dormitory throughout the afternoon and evening had already alarmed some of the other students in the nearby dormitory. At first, they didn't understand what strange things dormitory 216 was going to do, but in the end, they understood.

At the end of the evening, many of the freshmen from the brothers' dormitory next door came to visit.

Seeing that this dormitory is so cool and breezy and the temperature is suitable, everyone is envious and jealous!

When they came, they didn't want to leave, and they all stayed here to escape the heat. Suddenly, Yao Yayao's dormitory 216 was overcrowded, and all the freshmen in the neighborhood came to see this "special air conditioning" in this dormitory!

Many students are asking about the scientific working principle of this strange door and window, and Yao Yayao patiently explained to them based on some specific information on the Internet that he found on the Internet in the afternoon.

"There are two exits to the Philippine Prairie Dog Rat's Cave, one is flush with the ground, and the entrance to the cave is narrow. The other is a raised mound with a large opening. Physicists observed that it was precisely because of the different shapes of the two caves and the uneven size of the underground cave passages that the wind on the ground blew into the dogs and rats' burrows, bringing a cool breeze to the dogs and rats. This is actually the natural air-conditioning system of prairie dogs and rats, which is to form a kind of air effect. ”

"Due to the difference in atmospheric temperature on both sides of indoor and outdoor air circulation, the air pressure causes the air to flow quickly. The wind speed is determined by the temperature difference between the two sides, and the larger the temperature difference, the greater the wind speed. It is a phenomenon of air movement in meteorological aerodynamics. ”

"In ancient times, there was no air conditioning, and when the ancients designed buildings, they generally adopted the design of the north-south air passage. One end is open and the other end is narrow, which is conducive to reducing the indoor temperature. In Feng Shui, it is often referred to as yin. In many former alleys such as Beijing, Lanjing, and Xianhai City, the walls on both sides were deliberately heightened, and the lanes were not spacious, which was also to create a cooling effect of the hall wind. ”

After some gossip and exchanges, the students who came to visit the door generally knew the scientific working principle of this special air conditioner. They were amazed and moved. Many people plan to make gourds in the same way, and tomorrow they will also make one for their dormitories.

That night, Yao Yayao and the three of them slept very sweetly. It's still stuffy outside, but the 216 dormitory they are in is obviously much cooler.

Since the demonstration effect was clearly there, the contagion effect was immediately apparent. Only one day later, even at dinner, there are two or three student dormitories in the surrounding area, and such "special air conditioning" is also hung up.

Of course, the emergence of this kind of anomaly in the student dormitory immediately alarmed the official management staff of the school.

As the initial source of the initiator, at about eight o'clock in the evening, three uninvited guests came over to the 216 dormitory where Yao Yayao was.

Entering the dormitory gate were three adult men. One is Yao Yayao's grade counselor, Ms. Fan, and the other is Ms. Li, the full-time dormitory administrator of the dormitory. The other is a strange middle-aged man with a majestic face.

They motioned for the students to leave, and closed the door to the room in dormitory 216 facing the inner end of the hallway.

Only Yao Yayao, Pang Zi, and Huang Jie were left in the dormitory, as well as the three adults. Judging from the serious expressions on the faces of the three adults, Yao Yayao suddenly felt that he had some bad premonitions in his heart, and he was afraid that he did not have good intentions.

(To be continued)