Of course, you don't have to think about raising cats, not to mention cats, in the future, humans can be used as pets, probably only ants, and the strength of ants is probably greater than that of ordinary people, and I really don't know who slipped away when the time comes.

Wait until everyone gets up.

Dong Junwei gathered everyone and began to discuss the matter of blocking the crack in the door.

Because of yesterday's cat, this matter has to be completed even faster.

On the basis of the previous method, Tang Jing proposed an optimized plan, that is, half of the fence is installed for ventilation, and the other half is directly blocked, so that the slightly sized animals and insects can be blocked from the door at the same time, and the amount of work can be reduced as much as possible.

According to the results of the consultation with Tang Jing, the gap of the fence is ready to be set to 1 mm.

Today's human beings are about 4 mm wide at the shoulders and about 2 mm thick on the sideways.

For sturdiness, the fence itself uses iron rods with a diameter of 3 mm, the upper end inserted into the lower edge of the gate, and the lower end goes straight into the ground, each 5 mm deep.

In this way, about 125 stainless steel iron rods with a length of 2 cm and a diameter of 3 mm are required.

Just making these iron rods is no small project.

Fortunately, these are just repetitive labor, not too much technical content, Chen Du has made a lot of iron rods of this specification when he was training in the past few days, and now they are placed on a flatbed truck, ready to be transported to the door together after they are finished.

However, at this time, a problem arose.

The kitten that came yesterday is here again today.

Still meowing, constantly scratching the door.

It didn't stop until more than twenty minutes later.

Everyone didn't dare to go out to check, so they could only stop the project for the time being, after all, to do this, Chen Duan had to stay under the crack in the door, who knows if the cat would come back and forth......

However, after waiting for three days in a row, the little broken cat was not absent every day, several times a day, at an uncertain time, as if this had become its exclusive place to play.

"What can I do? If it comes every day, we won't dare to go out. ”

"I suddenly don't like cats a little." Du Jiajia puffed up.

Everyone was gossiping, but the result was still at a loss.

He Ying stood up suddenly: "Otherwise, I'll go outside to set up a sentry, and once it gets close, immediately call Chen Du in." ”

"No, it's too dangerous."

Dong Junwei immediately stopped.

"I won't go very far, and at my speed, I should be able to escape back in time." He Ying insisted.

"He Ying, don't go, the cat's speed must be faster than yours, and its steps are very light, you don't know where it will come out when the time comes." Zhao Xiaoyan obviously didn't want his friends to take risks.

"But you can't go on like this, sooner or later someone will have to take this risk."

"I have an idea."

After Tang Jing finished speaking, everyone breathed a sigh of relief.

"What?"

"We can set up a lookout point."

Tang Jing spoke, pointing to the high part of the door.

"What do you mean? Setting up a lookout on the door? ”

"We don't dare to go out because we're afraid of being attacked, but what if we stand on a high place?"

"A hole in the door?" Chen Du answered.

"Yes, just like I used to wear pipes." Tang Jing said with a smile: "However, my idea is that since we want to make an observatory, we have to consider that everyone will take turns to sit in the future in the future, but in this case, it will definitely not work like the previous mode of using the handle to climb, otherwise only Chen Du and He Ying can go up, and they can't keep the two of them standing guard." ”

"Height?"

"80 centimeters."

"The size of the cut-out?"

"A rectangle 3 cm high and 4 cm wide, with a thickness of 4.5 cm to open the door, but a transparent plastic sheet needs to be installed on the side on the outside."

"How do you get up?"

"It's better to have a staircase pattern, on this side of the door, slowly pull out a zigzag staircase, so that everyone can go up."

Chen Du is now proficient in cooperating with Tang Jing, and the communication is more concise, and the plan is basically settled in a few words.

"Wait."

He Ying shouted and asked, "You mean, make a hole in the door, and then let a person watch out there?" ”

Tang Jing smiled: "That's what it means, it's not just for this cat thing, I actually wanted to do it a long time ago, after all, now that I know that there are many dangers outside, if I wait for someone to hit the door before reacting, I'm afraid it's too late." ”

"So, you need to keep watch for a long time in the future?"

"Well, even at night, so I asked Chen Du to make the place a little bigger, just to consider that I can put a bed in the future."

"But is it necessary to not be able to see outside at night?"

"Just because you can't see now doesn't mean you won't be able to see well in the future." Tang Jing didn't explain too much.

"That's a good idea, but it's going to be a lot of work." Dong Junwei frowned slightly.

"Take your time." Chen Du sighed: "Anyway, I can't do anything now." ”

……

Because that naughty kitten has no choice but to add a bigger project before the project to seal the crack in the door.

Fortunately, this observatory will also need to be used in the future, and it will have to be built sooner or later.

However, this matter can only be done by Chen Duan alone, and others can't help if they want to.

From this day on, Chen Duan came to the door early every morning and began to renovate the inside of the door.

What he had to do was to dig a staircase above the door for people to walk on, and then go to a high place, and then dig through the door so that he could see the outside from the inside.

In this way, if something is approaching, it can be the first to warn.

The height of eighty centimeters has also been calculated by Tang Jing, if it is too low, the field of vision will deteriorate, and if it is too high, people with poor eyesight may not be able to see anything clearly.

This project is the same as plugging the door crack, it is not technically difficult, but the amount of work is very large.

After another three days, the staircase was only a quarter complete.

At this rate, it will take about ten days to complete.

And the most embarrassing thing is.

When Chen Du worked every day, a group of people could only watch there, and they couldn't help anything, which was very awkward for other people who were all classmates, and there was nothing they could do.

Wei Dalei also organized people to shout and cheer them on the side at the beginning, and Chen Duxi deserved to die, and drove them away with shouting and banging.

Chang Junyan was even more ingenious, saying that he wanted to sing below to cheer Chen Dui, but as soon as the first lyrics came out, he almost shocked Chen Dui from a high place - it's so ugly!

Only He Ying can really help, but she only occasionally climbs up to hand a water and towel to wipe her sweat or something.

The days go by quickly.

In the blink of an eye, another three days passed.

The staircase on the door is already beginning to see the scale, and it is about half completed.

However, on this day, after the noon break, Chen Du was about to start work, when he suddenly heard a thunderclap outside.

Subsequently.

Rain.