Shortly after Zhang Ping and Chu Yiyi left, an elite army of the demon clan passed by the place where the two had a "picnic".

A general from the Demon and Wolf tribe looked at the ground silently and gave an evaluation: "It's so arrogant!"

Another general of the demon clan and the leopard clan nodded, "If Zhang Ping is not eliminated, he will definitely be a big trouble in the future. Now he is so young, so many storms have already caused him; if he is given room for growth, tsk..."

The general of the wolf clan nodded, "Are there any elites from the Eagle clan coming? Ask them to send a few good men to stare at Zhang Ping from afar, and we must turn passive into initiative and be a thief for a thousand days. The Eagle clan's sharp eyes can hang Zhang Ping from afar. As long as we have the chance, we will attack and not give him a chance to rest.

In addition, send troops to intercept Zhang Ping's rear route to prevent him from escaping. He should have only two people coming and no more support."

The demon clan team continued to advance and supported the Longmen. Soon, news came: Xuan Feng, a genius from the Nighthawk clan, went to supervise Zhang Ping.

The Nighthawks are good at hiding and tracing, with sharp eyes and can have a good view in the middle of the night.

The senior executives of the demon army were temporarily relieved and began to seriously defend the outpost of Longmen.

On the other side, Xuan Fengfei was in the sky, trying to find Zhang Ping, but he couldn't find any trace for a while.

So, where did Zhang Ping go?

Of course it was hidden!

As a qualified Pipi, of course he knows the principle of running away with a shot. Don’t think that Zhang Ping was brainless and arrogant before, but in fact he was a show, which caused psychological pressure on the hostile target and also interfered with the other party’s judgment ability.

Showing the enemy to "fake" and confuse the public is the most basic military strategy.

When almost all the demons, gods and other aliens thought that Zhang Ping was an unscrupulous, domineering and arrogant person who rode alone for thousands of miles, Zhang Ping had already hid with Chu Yiyi.

Where are you hiding?

Of course... the dragon's mouth flew in the sky and mixed into a group of atmospheric creatures!

If this dragon is more than 30 meters long, it is more than 3 meters long. Zhang Ping and Chu Yiyi can easily lie in the dragon's mouth. Of course, the two of them 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 nagged: "We only need to find the gravitational point between the Demon Clan, the Climbing Dragon Cave Heaven, and the current main cave heaven. Then throw the bomb over, but we don't need to go over."

"Graining Point?" Chu Yiyi blinked, "What is that?"

Although I accepted the memory of the previous life of "Chu Zhaoxiang", it was obvious that there was no concept of technology in the previous life, and Chu Yiyi in this life was ultimately a middle school student and had limited knowledge.

It is like Zhang Ping who directly enters the virtual memory space and becomes a disciple of Li Geying. There are many senior brothers and sisters, plus krypton gold, but they have mastered unimaginable amount of knowledge.

When Zhang Ping heard Chu Yiyi's inquiry, he explained: "Just say it is more abstract, just make a metaphor. Take the Earth-Moon system of the Earth-Moon as an example.

There was a legend a long time ago, there was a legend. There was a planet a long time ago, there was a legend on the planet. There was a legend on the planet a long time ago, there was a country on the planet. There was a legend... Oh, let go!"

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

"Okay OK. When we haven't walked out of the planet and first explored the moon and space, the spacecraft did not directly ignite and launch it to the moon. It would consume too much fuel and the cost would be higher than the sky.

So in actual launch, the spacecraft is given a suitable initial speed so that it can fly to the gravitational balance point between the earth and the moon, slightly exceeding a little.

After the spacecraft flies through this equilibrium point, it will be captured by the moon's gravity and then fall to the moon. This process does not consume fuel acceleration, but in the end it will consume fuel to slow down."

Chu Yiyi nodded. She understood by saying this.

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

Chu Yiyi frowned and wanted to nod, but she felt something was wrong.

Zhang Ping said: "There is no so-called up, down, left and right in the universe. If you only look at the earth and the moon alone, you can only be regarded as two celestial bodies with interaction forces, rotating around the gravitational point, and the gravitational point is the center. In that era when we just looked up at the stars, we could be said to have "jumped over" from the earth to the moon.

Similarly, there are similar rules in the current Cave World.

Gravity is one of the basic laws of the universe, and it also applies here. There is also such a gravitational point between the cave heaven and the cave heaven. We entered here from the Damengze Cave Heaven and came through this gravitational point. Similarly, we now need to find the gravitational point between the demon tribe Cave Heaven and the ancient continent."

Chu Yiyi understood, and then made a disdainful voice: "Look in the direction of the demon clan, how simple."

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

I don’t know what caused the connection between the fifty-four caves and heavens. In fact, we have not yet studied the root cause.

But one thing is clear: there is a complex gravitational relationship between these 54 caves, so there are also many gravitational points. What we are looking for is a gravitational point that the demon race does not know or pays attention to. Then as long as the bomb is thrown here, the bomb will fall to the Dragon Cave Heaven."

Chu Yiyi nodded and suddenly realized: "Actually, this is not a spell. Using basic gravity relationships, it can easily throw a bomb hundreds of thousands of kilometers away."

Zhang Ping nodded with a smile.

Chu Yiyi asked again: "But this gravitational point requires rigorous scientific observations and huge data calculations. It is impossible to find it with just a few simple cameras."

Zhang Ping smiled and shook his head: "Ordinary cameras are of course not possible. I use special cameras such as infrared, ultraviolet, and even nuclear radiation, electromagnetic radiation.

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

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

The distance between the cave heaven and the cave heaven is relatively close, and it is also full of atmosphere, and there is a lot of material exchanges between each other. We can observe the exchange of these materials to find gravitational points."

Chu Yiyi suddenly realized again.

Zhang Ping sighed: "Did you understand again?"

What does it mean? Look down on me, right! Chu Yiyi's eyebrows are raised, "What do you mean!"

Zhang Ping spread his hands with a serious look on his face: "I just think you are so smart. You can understand whatever you say. You ask and don't know!"

“…”
Chapter completed!