Although Chen Hui has a certain understanding of the world, he still doesn't know enough about it. For example, he doesn't know about the funeral customs at this time.

The green emperor, as well as several witches and warriors, could not help nodding after seeing these civilians splashing water in Prince Chang's tomb and the situation after splashing water.

Obviously, the construction of Prince Chang's tomb was very successful.

From this, Chen Hui roughly thought of the standard for building tombs at this time. Besides the size and depth of tombs, the most important standard is waterproof.

After thinking of this, Chen Hui could not help but carefully observe the tomb built for Prince Chang.

In other words, Chen Hui wanted to make clear that the tomb built for Prince Chang was a kind of tomb excavated deep underground, and how the drainage system was constructed without any buildings.

After careful observation, Chen Hui can see some clues. Although the tomb is like this, it is not like this.

At this time, the color of several circles of soil around the tomb is slightly different.

It can be seen that this tomb is actually much bigger than what Chen Hui saw at this time. It is divided into many circles, but several outer rings have been backfilled at this time. I don't know the position of the backfilled outer ring and what kind of treatment has been done, which leads to the strong water absorption function.

Now that the outer ring of the tomb has been backfilled, Chen Hui naturally can't open it up for inspection.

However, around the tomb of Prince Chang, there are mounds for backfilling.

The mound is divided into three piles with different colors.

Just as Chen Hui thought about the use of the three piles of backfill soil of different colors, a wizard went over and reached out to twist the backfill soil.

After seeing this scene, Chen Hui went over, squeezed some soil in his hand, gently twisted it, and asked the wizard in a low voice why he needed three kinds of backfill soil.

The three backfilled mounds are located in three different directions, and the colors are also different. At a glance, we can see that they are used differently.

The wizard gave a simple answer to Chen Hui's question in a low voice. This kind of soil with some gray color was transported from other places. There is no such soil here.

And this pile of soil is the soil that Chen Hui is twisting. After twisting, the fragments of the soil are very fine, which makes people feel very smooth, a bit like cement or talc.

But it's definitely not cement or talc.

After the wizard's explanation, Chen Hui understood that this kind of soil would be covered and tamped immediately after Prince Chang's coffin was buried.

The compacted soil has strong waterproof function.

Judging from the meaning expressed by the wizard, this kind of soil can resist 78% even though it is not 100% waterproof after tamping.

The upper layer of soil is also transported from other places, and its water absorption is particularly strong.

The first layer of water-proof soil to cover the coffin will not appear flat after tamping, but in the form of radian, similar to the bottom of the pot.

Then above is this layer of water conductivity better soil!

On the top is the common soil, which is also excavated from the tomb of Prince Chang. This kind of soil should be used to seal the top.

In this way, no abnormality can be seen in the top layer, while the lower layer is the soil layer with strong water absorption, which will play the role of water diversion. The bottom layer with strong water resistance, because it is the form of inverted bottom of the pot, the water will be guided along the downward radian on both sides.

The water absorption of the whole wall of Prince Chang's tomb has been shown, so it is not difficult to think that even if there is deep groundwater, it will be led away, which has a strong waterproof effect.

What's more, Prince Chang's tomb is on a slope. Even if it rains, there will be little water going deep into the ground. Most of the water will flow along the slope.

The more heavy the rain, the faster the water flow, but the light rain will penetrate.

Although the infiltration capacity of light rain is strong, the rainfall is not large, while although the heavy rain is heavy, the vast majority of rainwater will flow away.

The tomb of Prince Chang is so deep. Light rain can penetrate into the depth of Prince Chang's tomb. I'm afraid it will take at least one or two months for light rain to penetrate into such a deep depth. The waterproof effect of the tomb itself, not to mention the extension of the infiltration time.

Chen Hui realized something and asked the wizard in a low voice whether the walls around Prince Chang's tomb were backfilled the other way around?

The wizard gave a positive answer. The walls around the tomb are indeed backfilled in the reverse way. The top layer is still excavated soil, while the second layer is waterproof soil. The third layer, that is, the walls of the tomb, is highly absorbent soil.

In this way, the rapid drainage effect is realized, and the relatively perfect waterproof structure is realized.

When Chen Hui thought of it, he also had to praise that this world is not a world with advanced modern science and technology, but a world similar to the one Chen Hui came from. The only difference in history is that this world is a world that can be cultivated.

The whole Tomb of Prince Chang has nothing to do with cultivation.

The combination of material and structure realizes the waterproof function of Prince Chang's underground tomb and proves the wisdom of people in this world!

In response to that sentence, we should not underestimate the wisdom of the ancients.

"I'm sure it will be finished today!" A warrior said at this time, "it won't delay you!"

Prince Chang's tomb is in the closing stage. Today, it will be completed. The funeral of Prince Chang will be the day after tomorrow, so it will not delay.

"Where has Prince Chang's body been transported?" At this time, the green emperor asked, "it's time to send it here, too?"

Prince Chang died in the Royal City, but he had to be buried here. His body must have been transported here.

"Arrive at dusk today." A wizard replied, "you must wrap Prince Chang's body with aura all the time. The road is relatively slow."

Prince Chang's corpse was wrapped by the aura of four witches to prevent the corpse from rotting. When it was transported here, the witches took turns, so the speed was not fast.

"Morgue, Prince's house!" The green emperor said in silence.

The wizard immediately agreed to leave first and went to the gate of Hengcheng to wait.

After Chen Hui understood the waterproof principle of Prince Chang's tomb, he no longer felt magical. At this time, Chen Hui thought about another problem.

The day after tomorrow, I should be able to see the Tu emperor and the Jin Bai emperor, right?

These are the last two emperors Chen Hui has never seen!