Before this person went up, he tied his waist with a rope, and then there was an automatic contraction function in this device, that is, the rope began to shrink as he went up.

But it is impossible to lift people up, otherwise they will directly send people up one by one, but if it is really the kind of person who has difficulty moving, this can also be pulled up with the help of human power in a short period of time.

At the end of the rope there is a very wide strip of cowhide cloth, which is so that people do not look so uncomfortable when tightening.

The ladders are fixed in the vertical holes, some distance from the cliff, so that people can hold on to the ladders.

On the surface, the degree of security seems to be very large, but the specifics are really unknown

The disadvantage is that only one person can be transported at a time, of course, if someone is not afraid of height, is not afraid that the rope is not tied to the body is not safe, or is not afraid of the person above in case of falling down and hitting himself, then he can also follow behind.

Of course, if you don't follow it very far, there shouldn't be much of a problem, because the rope on it can contract automatically.

If the person falls down again, the rope will automatically get stuck, so it won't fall down for a special reason, but the problem is that the people below are likely to be afraid of heights.

At this time, the line of sight is already very good, not to say that you can clearly see the distance below, but how far away from you below is to be able to see clearly.

Most people have never experienced this kind of height, so it is likely that they will be afraid of this situation.

What makes Mo Yu feel better is the other design of this hole.

The first place is in this cave, which is this cave that goes down vertically, and the outside of his lock is locked on the outside, but if you go down with the person, you will find that the key that is close to this level is locked on the inside.

In other words, if the cave does collapse, people from outside can directly enter the vertical hole and open the lock.

Of course, this is not the most elaborate part of the design, and the first part of the most intricate design comes from another place, which is that there are two small holes in this vertical cave.

These two small holes are completely capable of one person standing inside, which means that each small hole can stand one person to two people or so.

There are handles inside each small hole, which is to prevent people from standing unsteadily.

That is to say, if there is a collapse, the person has to go down and open the lock, and after opening it, the person can stand in the small hole next to it, and let the more frightened people below come up first.

There is no need to wait for the rescuers to go up first and then let them come up slowly, and they can be a commander while calming their minds.

You can also go down to two people at the same time, so that there can be some staggering, that is, you can let people from both sides pass through each other.

The design of this point will definitely take a lot of effort, but it is indeed a relatively small project compared to the whole of Shandong, but it can produce a greater benefit to unexpected events.

It's a vertical downward spiral from the top of a mountain, and there must be quite a few other places, those that are not particularly high, and there is one at a very short distance.

Basically, the design is the same, there are some equipment on it and a hut is built to prevent these equipment from being damaged by wind and rain, there are ladders in the caves, and there are some small holes in the vertical caves that allow people to stagger forward.

These denser ones can save more people, and when it's not sure where it will collapse, more people can get out of it.

As for the goods, it is uncertain, it is the best to rescue it, and there is no good way to rescue it, after all, human life is still the most important, if people are there, then everything is there.

What's the use of having more money and possessions if people aren't there?

As a second-generation official, Mo Yu has a lot of knowledge, and some ordinary people may know about the existence of this cave, but this number is relatively small.

But Mo Yu can clearly see this kind of rescue facilities, and he is actually a relatively knowledgeable person.

Take that bandit as an example, many people may have never seen that kind of situation in their lives, and Mo Yu, as a person who was present in person, could get some benefits no matter what.

In fact, Mo Yu also asked Mo Changji how these holes were punched, and how to make sure that the front and back or up and down could be just in touch.

It seems that they are all one-time successes, so Mo Yu is more puzzled by this.

Mo Changji didn't explain this matter very clearly, but he made Mo Yu understand some key words at that time.

Even when digging a cave, the horizontal distance is generally not carried out in accordance with the construction method of the front and back, if it has to be carried out in this way.

That is to say, the official road before and after has been determined, and it is necessary to determine the position of the front and back when digging the cave, so it is basically carried out in a rectangular way.

It is to determine a long straight line at the foot of the mountain, and if this long straight line is basically a very long rope, pull this rope straight.

Then in front of a cave ready for construction, pull a rope that is also very long, and this rope needs to be perpendicular to the original rope.

After determining this distance, find a rope that is exactly the same as this rope, and at the end is also perpendicular to the original rope, pull out a long distance, and finally determine the position of the other end at the tail of this rope.

That is, according to a parallel principle.

Then when the cave is dug up, as for the original rope parallel.

People's feelings can be realized in some short distances, that is, some people's intuitive feelings, but compared to this kind of large-scale projects, they certainly can't follow intuitive feelings.

But how to ensure that the cave is straight when digging the cave before and after, this Mo Changji also told Mo Yu.

In fact, this knowledge can be seen in books, but it does not form a systematic theory, and it is also made by experience, which is relatively scattered.

It's not particularly easy for Mo Yu to find it, it's probably a related book that mentions it, so there are too many books to find in all types of books.

Mo Changji said that the way to determine whether this is straight is also very simple.

The second rope has been determined in a direction, and it is enough to dig it in the vertical direction of this direction, basically according to some fixed or some objects that are not easy to deviate.

That is to say, solid, such as some wooden boards or sticks, insert them into the ground and connect them one by one to form a direction, dig a little to determine the direction, dig a little to determine the direction.

So you can dig almost, and even say that you are holding a very long pole, for example, if a pole is not enough, it is connected with a rope, and this pole must be a straight pole, that is, the angle has been determined.

Whoever started to continue the pole in the process of digging, so that the direction was easy to determine.

As for the above, that is, a vertical hole, it is relatively easy to determine in the process of digging, and this is generally determined with a rope.

It is also based on the way of inserting wooden strips, and the rope is determined according to a precise direction, and finally a few holes can be dug appropriately in this place.

If you say how to dig a vertical hole, it is basically in accordance with the way of digging a well, spending a little reinforcement and digging a little reinforcement, that is to say, safety first.

Of course, in the cave, that is, in the horizontal cave, people and countries still try not to want this kind of collapse to happen.

So this reinforcement is even more powerful, in which some stout wooden sticks are put on top of the plank, as the saying goes, a wooden top is a thousand catties.

And the wood is buried, so when you look at the digging of the cave, some of the wood can be seen, and some of the wood is buried directly in order to strengthen it better.

In the middle of the middle, you can see rows and rows of wood, on the one hand, to make the passage on both sides smoother, that is, to pass in one direction without occupying the passage in the other direction.

On the other hand, of course, in order to be able to raise this level of security to the highest level, these things don't take much effort, and they can basically build the level of this cave to the highest level of security.

So far, I haven't heard of a cave collapse.

So in some of the escape caves, some may be deserted, but some people don't bother to change the contents inside.

That's why there are some cases of peak inspections.

That's why Mo Yu was able to follow Mo Changji to see these very uncommon things.

Of course, if a special situation really happens, the army will definitely have a higher degree of protection for this place, because where caves can be built, basically the distance they can save is not a little bit, it is estimated that they can save a lot of distance.

Otherwise, such a cave would not have been opened.

Mo Changji's explanation is quite clear, of course, there may be some subtle differences, but the general situation is like this, according to the rectangular method to determine the direction of this cave, when one direction is determined, the other directions are easy to determine.

The error will become very small, and even if it is staggered, I believe that it can be heard during the construction process, and the strategy can be changed again.

But basically there has never been such a situation, because after this situation occurs, it will actually be extremely troublesome, after all, this kind of thing is a national thing, no one wants to be criticized, no one wants to take off their pants and fart, looking for trouble.

Of course, although the establishment of this kind of cave is quite simple, if it is really done, it is indeed more troublesome, and it is likely to sacrifice some things, otherwise you will build a cave directly when you encounter a mountain, and there is no need to detour or go uphill.

If it's easy to build a cave, why bother.

Therefore, this kind of thing is still more troublesome, and the waste of financial resources is indeed relatively large, otherwise there is no need to charge some fees.

When these fees are collected, the cost of maintenance and personnel will still be paid by the local city in the future, so the south is still more troublesome for this kind of thing, and they do not particularly want to build such things within their own jurisdiction.