Soon after Zhang Ping and Chu Yiyi left, an elite legion of the demon clan passed by the place where the two of them were 'cooking'.

A general of the demon clan and the wolf clan silently glanced at the ground and gave an evaluation: "Arrogant enough!" ”

Another general of the Demon Clan and the Leopard Clan nodded, "If this Zhang Ping is not removed, it will become a big disaster in the future." Now so young, there have been so many storms; If you give him room to grow, tsk......"

The wolf clan general nodded, "Is there any elite from the Eagle Clan?" Let them send a few good hands to stare at Zhang Ping from afar, and we must also turn passivity into initiative and be thieves for a thousand days. The eagle clan has sharp eyes and can hang Zhang Ping from afar. As long as there is an opportunity, we attack, and we do not give him a chance to rest.

In addition, send troops to intercept Zhang Ping's back road to prevent him from escaping. He should only have two people coming over and no more backups. ”

The demon team continues to advance and support the Dragon Gate. In a short time, news will come: among the Eagle Clan, Xuan Feng, the genius of the Night Eagle Clan, has gone to supervise Zhang Ping.

The Nighthawk is good at stealth, tracking, sharp eyes, and can have a good vision late at night.

The top brass of the demon clan army was relieved for the time being. Begin to seriously defend the outpost of the Dragon Gate.

On the other side, Xuan Feng flew high in the air, trying to find Zhang Ping. But for a while, no trace was found.

So, where did Zhang Ping go?

Hidden, of course!

As a qualified Pippi, of course he knows the truth of running away with one shot. Don't think that Zhang Ping was brainless and arrogant before, in fact, it was a show, causing psychological pressure on the hostile target, and also interfering with the opponent's judgment ability.

Showing the enemy as 'fake' and confusing the public is the most basic military strategy.

When almost all the demon clans, god clans and other alien races thought that Zhang Ping was an unscrupulous, domineering, and arrogant person who rode alone for thousands of miles, Zhang Ping had already taken Chu Yiyi into hiding.

Where's the hiding?

Yes, of course...... In the mouth of the dragon, flying in the sky, mixed in with a group of atmospheric creatures!

To say that this dragon is also more than 30 meters long, a dragon head is more than 3 meters. Zhang Ping and Chu Yiyi could easily lie in the dragon's mouth. Of course, the two added a wind shield to themselves to isolate bad breath.

Outside, there were several cameras hanging on the dragon's head, and Zhang Ping and Chu Yiyi were in the dragon's mouth, exploring the outside world and looking for targets.

Zhang Ping chattered: "We just need to find the gravitational point between the Demon Clan, the Falling Dragon Mountain Cave Heaven, and the current main cave sky." Then drop the bomb and we don't need to go again. ”

"Gravitational points?" Chu Yiyi blinked, "What's that?" ”

Although he accepted the memory of his previous life, he obviously had no concept of science and technology in his previous life, and Chu Yiyi in this life was a middle school student after all, and his exposure to knowledge was limited.

Where is Zhang Ping, who directly enters the virtual memory space, apprentices to Li Geying, and has many senior brothers and sisters, plus krypton gold, but he has mastered an unimaginable amount of knowledge.

Hearing Chu Yiyi's inquiry, Zhang Ping explained: "It's more abstract to say it directly, let's make an analogy." Take, for example, the Earth-Moon system of the Earth's Moon.

Legend A long, long time ago, there was a legend, a legend was a long, long time ago, there was a planet, there was a legend on the planet, there was a legend, a legend was a long, long time ago, there was a country on the planet, there was a legend...... Wow, you let go! ”

"No nesting dolls!" Chu Yiyi pinched Zhang Ping's ears hatefully.

"Okay, okay. Before we went out of the planet and first explored the moon and space, the spacecraft was not directly ignited and launched to the moon, which would consume too much fuel and cost more than the sky.

Therefore, in the actual launch, the spacecraft is given a suitable initial velocity, so that it is enough to fly to the gravitational equilibrium point between the earth and the moon, slightly more than a little bit.

Once the spacecraft has passed this equilibrium point, it will be captured by the Moon's gravity and fall towards the Moon. This process does not consume fuel to accelerate, but in the end consumes fuel to slow down. ”

Chu Yiyi nodded. It makes sense when you say it this way.

Zhang Ping said again: "Then the question is, is the moon above the earth?" ”

Chu Yiyi frowned and wanted to nod, but felt that it was wrong.

Zhang Ping said: "In the universe, there is no so-called up, down, left and right, if you only look at the earth and the moon alone, it can only be regarded as two celestial bodies with interactive forces, revolving around the gravitational point, and the gravitational point is the center." In that era when we were just looking up at the stars, we could be said to 'jump' from the earth to the moon.

Similarly, in the current cave world, there are similar rules.

Gravity is one of the fundamental laws of the universe, and the same applies here. There are also such gravitational points between the cave and the cave sky. We entered here from the Great Dream Cave Heaven through this gravitational point. In the same way, we now need to find the gravitational point between the Demon Clan's Cave Heaven and the Ancient Continent. ”

Chu Yiyi understood, and then let out a disdainful voice: "Follow the direction where the demon clan came from, how easy it is." ”

Zhang Ping shook his head: "It's really not that simple. Although the world of the cave also follows the law of gravity, because the cave itself is a nearly flat world, the gravitational point is also constantly changing.

I don't know what caused the connection of the fifty-four caves and the heavens, and in fact, we haven't studied the root cause until now.

But one thing is clear, between these 54 cave heavens, there are intricate gravitational relationships, so there are also many gravitational points. What we are looking for is a gravitational point that the demon clan doesn't know or doesn't pay attention to, and then as long as we drop the bomb here, the bomb itself will fall to the Falling Dragon Cave Sky. ”

Chu Yiyi nodded at this time, and suddenly realized: "Actually, isn't this a kind of spell, using the basic gravitational relationship, easily dropping a bomb hundreds of thousands of kilometers away." ”

Zhang Ping smiled and nodded.

Chu Yiyi asked again: "But this kind of gravitational point requires rigorous scientific observation and huge data calculation, and it is impossible to find it just by relying on a few simple cameras." ”

Zhang Ping smiled and shook his head: "Of course ordinary cameras can't, I use special cameras that can observe infrared, ultraviolet, and even nuclear radiation and electromagnetic radiation."

There is a gravitational relationship between the two caves, and gravity will inevitably change some phenomena, such as causing fluctuations in temperature, changes in the magnetic field, uniformity of natural radiation, and even the movement of wind and dust and the atmosphere, etc., which can be observed.

The wind cannot be seen directly with the naked eye, but we can see the fluttering of leaves.

The distance between the cave and the cave is relatively close, and the atmosphere is also filled here, and there is a lot of material exchange between each other, and we can observe the exchange of these materials to find gravitational points. ”

Chu Yiyi suddenly realized again.

Zhang Ping sighed: "Do you understand 'again'?" ”

What do you mean by 'again'! Look down on me! Chu Yiyi's eyebrows were raised, "What do you mean!" ”

Zhang Ping spread his hands and looked serious: "I just think you are so smart, no matter what you say, you can understand it." I don't know! ”

“……”

(Happy holidays to all)