It was quiet in the imperial study room.

Lu Qingshan was silent for a moment, then slowly opened his mouth and asked the first question.

It is also the issue he is most concerned about at the moment.

"What exactly is the first law?"

"You should have guessed it." Qin Yitian stepped forward and pulled out an ancient wooden box from under the desk that Lu Qingshan was very familiar with.

On the box, dragon and phoenix carvings are about to appear.

Qin Yitian gently opened the box, and a flash of red light flashed through the box.

The beautiful dragon bird is lying peacefully in the box.

"Yes, the dragon bird is the first dharma, or in other words, it is the carrier of the first dharma."

"So, the first method is time retrieval?" Lu Qingshan asked again.

Judging from the current situation, no matter how incredible it is, the first method should be related to time.

Unexpectedly, Qin Yitian shook his head and said: "No, the first method has nothing to do with time...it has something to do with cause and effect."

"Its real name is the Law of Cause and Effect." She said seriously.

"Cause and effect?" An unexpected and reasonable answer.

After all, when Lu Qingshan understood the true meaning of cause and effect, Qin Yitian had already told him that Longque was the sword of cause and effect.

And as we all know, the law of cause and effect is the most terrifying weapon in any world.

"Yes, cause and effect," Qin Yitian nodded slightly and added: "To be more precise, it should be called reverse cause and effect."

"Reverse cause and effect...?"

Seeing Lu Qingshan's thoughtful expression, Qin Yitian gently pulled out the brush that was resting on the inkstone on the desk and soaked in ink like a clear pool.

Then, she took out another piece of rice paper from the stack and laid it on the "Mountains and Rivers Broken Wind Floating Catkins".

Qin Yitian held a pen in his hand and marked two points on the rice paper.

"Cause and effect are like two points on a white paper. This is the cause." Qin Yitian pointed to one of the points, then pointed to the other point and said, "This is the effect."

"All cause and effect are destined. When the cause occurs, the effect has already appeared." Qin Yitian then drew a straight line segment between the two points, "And this line segment, that is,

This development process from cause to effect will follow."

"That is to say, under normal circumstances, when a cause occurs, no matter how you draw the line in the middle, no matter how twisted it is..."

Qin Yitian then made a twisted line segment from the "cause" point, twisting and turning, and finally ended at the "effect" point, "But its ending is the same, and it will all fall at this effect point."

"And what the law of cause and effect does is also very simple, that is, when the fruit comes, wave the sword to erase the fruit point." Qin Yitian put the brush back into the inkstone, and the pen smudged out in the ink.

"After this point, everything will be reversed, and the "result" will be determined by the direction of the line segment, not by fate."

"That is...reversing cause and effect."

Lu Qingshan was stunned.

"Then why would you give me such an important sword?" After thinking for a moment, he asked again.

Even if the cause and effect is reversed, it cannot be explained why Tong Qin Yitian took a fancy to him at a glance and gave him unparalleled trust.

"General, don't worry, I will explain everything clearly to you." Qin Yitian said softly.

"The law of cause and effect is the first law. It is extremely powerful, but it also has many limitations."

"First of all, when I use the law of cause and effect to cut off the consequences of destiny, I can go upstream, follow the river of time, and find a time node in the original line of cause and effect to start over."

"It's like going back in time."

"Of course, this backtracking is limited."

"My limit is to look back thirty years."

Guzhu

"Then, the timeline of reversal of cause and effect is a closed loop.

It only exists between the time node I chose and the original result."

"In this closed-loop timeline, as long as the general does not die at the hands of others, he can return to the original time node by committing suicide."

"But once time passes the point of effect, the law of cause and effect loses its effectiveness."

"To put it simply, if time passes by the day when I cast the law of cause and effect, if the general commits suicide again, he will really commit suicide."

"I wonder if the general can understand what I say?"

I'm familiar with this, isn't it just archiving, reading files and automatically saving over the original archive... Lu Qingshan nodded to express his understanding.

Qin Yitian nodded and continued: "Second, after reversing the cause and effect, all things that have happened in the original cause and effect line cannot be touched, otherwise they will be erased to calm the chaos of the cause and effect line."

"In general, time is like a long river, and people are passengers on the ship. Cause is the starting point of the ship, and the effect is the end point.

When the ship sets off, it has already set its destination. Even if there are twists and turns along the way, it will eventually sail to the destination.

Reversing cause and effect is like stowaway. During the journey, you must try your best to hide yourself and not be discovered by the captain, otherwise you will be beaten to death."

"The problem is that I myself am a person in the line of causality, that is, a passenger on the ship.

Passengers already know their destination when they board the ship, so I must not change the route, otherwise the captain will immediately find out that there is something wrong with me."

"If I want to change the course and let the ship sail somewhere else, I can only drag someone on board who is not on the ship."

"Reversing cause and effect, I can only be a bystander and cannot be the executor."

"As you can see, no one in the Taoyuan Realm can escape the troubles of strange ghosts."

"That is to say, everyone in the Daoyuan world is on this ship."

"Following this principle, the general should come from outside."

Lu Qingshan was in a complicated mood. He looked at Qin Yitian and nodded: "Yes."

"Moreover, the general should come from the future." Qin Yitian smiled and then explained:

"The ship we are on has very strict identity checks. It doesn't mean that if I pull just one person, he can get on the ship. He will definitely be ostracized in all aspects."

"Only if there is a very deep cause and effect between this person and me, can I pull him on board."

It is not difficult to understand that ship passengers who want to bring a stranger on board are naturally not allowed, but if they can prove that this person is their relative, it is not that difficult.

"When I was performing the law of cause and effect, I felt as if I was on the long river of time and flying backward very quickly. At the same time, I could see the cause and effect line on my body and the person at the other end of the cause and effect line."

"Unfortunately, everyone who has a causal relationship with me is on the ship."

"As I said before, people on the ship cannot change course."

"Just when I was desperate, a line of cause and effect began to appear in my body inexplicably."

"This line of cause and effect is looming, very illusory, leading far into the long river of time, as if it might disappear at any time."

"This is not because the causal relationship between the person on the other end of the causal line and me is too shallow. On the contrary, the bond between him and me is extremely deep."

"Because this is a causal line that spans the long river of time."

"I don't know the person on the other side of the causal line now, but in the future, there will be an inseparable bond between him and me."

"I don't know how close the bond is to allow the line of cause and effect to span the long river of time.

But I knew that the person who had such a bond with me must be trustworthy, so I, who was almost in a desperate situation, grabbed this thread without hesitation and pulled the person on the other end of the causal line on board."

"At the last moment of reversing the cause and effect, I also saw the face of that person clearly."
Chapter completed!