Let's start by analyzing the sun

"You can pass!"

The squad leader's shout declared the end of the inspection.

Several Crimson Armor soldiers immediately moved the obstacles, clearing the road.

The Three-Leaf level servant, Jie Qing, first offered a polite thank you before driving the crystal energy car slowly towards the forest ahead.

It wasn't that he didn't want to go faster.

But he didn't dare.

The steward of the Residence Hall had specifically warned him several times that the Spirit Oak Demons were not good-tempered creatures and to be as gentle as possible to avoid angering them.

"Huff~"

A cold wind blew past.

The Spirit Oak Demons' branches and leaves swayed gently, looking as if they had fallen into a slumber.

Jie Qing couldn't help but curse inwardly, "What a damn ghostly place!"

Because this servant strongly felt that he was being watched intently by countless eyes.

This eerie feeling made the hairs on the back of his neck stand up, and even the hands holding the steering wheel couldn't help but tremble.

Amidst his fear and trepidation, Jie Qing muttered softly, "That matter is probably true."

The "matter" he spoke of was a rumor circulating within the Profound Palace.

More than a month ago, the Special Envoy had used astonishing methods on the Spirit Oak Demon forest, creating an earth-shattering spirit tide.

It was said that the next day, a mid-level Profound Warrior who mastered Wood Spirit-type Profound Arts wanted to study the Spirit Oak Demons, but was instead captured by them.

Many servants didn't believe this rumor.

Because the Spirit Oak Demons' combat power was clearly inferior to that of a Profound Warrior, and the power of a mid-level Profound Warrior using Wood Spirit-type Profound Arts was definitely stronger than that of the Spirit Oak Demons.

Many people believed another rumor: that after being baptized by the spirit tide, thousands of Spirit Oak Demons had undergone extremely strange changes, greatly increasing their strength.

Jie Qing now tended to believe that the latter was the truth.

Just then.

An accident occurred.

"Whirr! Whirr!"

The sound of friction rang out densely.

Hundreds of branches rapidly coiled over from all directions.

In an instant.

The crystal energy car was entangled by the branches and gently lifted up, its four wheels spinning in the air, unable to move forward even a fraction.

Jie Qing screamed in fright, "Mommy!"

He immediately remembered the steward's words, not to shout loudly, and quickly shut his mouth tightly.

The next moment.

An even more astonishing scene appeared.

Dozens of branches rapidly intertwined in the air, actually forming a line of text - Special Envoy is working, you are not allowed to disturb!

Jie Qing simply couldn't believe his eyes.

Heavens!

The Spirit Oak Demons could write?

He had never heard of such a thing!

Jie Qing mustered his courage and stammered, "I... I am ordered to deliver... deliver a batch of important parts to the Special Envoy!"

After saying that.

He realized that he was being stupid.

The Spirit Oak Demons were not humans and could not understand human speech at all; extraordinary means had to be used to communicate with them.

However.

An unexpected thing happened.

"Whoosh! Whoosh!"

More than ten branches rapidly extended to the rear of the vehicle; looking through the rearview mirror, they seemed to be inspecting the parts packed inside the wooden box.

A second later.

"Bang!"

With a muffled sound.

The crystal energy car was placed back on the ground, its wheels pushing the vehicle to drive slowly forward.

Hundreds of branches retracted in the blink of an eye, as if the scene just now was just an illusion.

Clearly.

The Spirit Oak Demons had let him pass.

Jie Qing's heart thumped, and a thought belatedly popped into his head: "Did the Special Envoy train them?"

This distraction.

Caused the crystal energy car to veer to the side, its front crashing into a Spirit Oak Demon.

"Whoosh! Whoosh!"

Several branches immediately probed over, adopting a serious warning posture.

Jie Qing quickly turned the steering wheel, controlling the crystal energy car back to the center of the road.

The branches immediately left.

Jie Qing breathed a sigh of relief and muttered, "So powerful!"

This was a double entendre.

On one hand, it was lamenting that the Spirit Oak Demons had become spirits.

On the other hand, it was admiring his lord's methods, that he actually had a way to train such irritable creatures.

*

Before long.

Jie Qing finally saw Special Envoy Cheng.

This servant stopped the crystal energy car, got out of the car as quickly as possible to salute, and said respectfully, "Special Envoy, the new batch of parts has been delivered."

Before Jie Qing could raise his head, he heard a gentle voice, "Thank you for your trouble!"

He replied in flattered surprise, "It's not hard! Serving you is my greatest honor! It is also my duty as a servant!"

"Click! Click!"

A slight sound came over.

Jie Qing instinctively looked towards the sound, a trace of amazement flashing in his eyes.

He saw a rather large sand table, carved into the shape of a spirit leaf, on which there was a row of miniature railcars, running along a circular track.

It must be said.

That the model was simply exquisite to the extreme, with all sorts of details exactly the same as a real railcar.

At a glance, one could tell that this thing must have come from the hands of an extremely skilled craftsman, and could not have been made for less than one or two hundred gold coins.

Jie Qing instantly realized that this was the little toy that the Special Envoy had been obsessed with recently, and also the railcar model of the Tai'an Small Spirit Realm.

Of course.

This inevitably had the suspicion of fooling around.

For a dignified Profound Warrior to play with this kind of little thing all day long, and to let the Heavenly Craft Hall spend time and effort to build the model, was this really appropriate?

But for a genius, even the Palace Lord remained silent.

Forget it!

Let him be!

Cheng Han glanced at the servant and asked with a smile, "If the speed of the railcar is faster than a Profound Warrior's flight, what do you think?"

Jie Qing was stunned for a moment, and quickly replied, "That is a very good idea."

This servant thought for a moment, and boldly said, "The current railcar is not much faster than a bicycle, and there have been many derailment accidents over the years.

"It is conceivable that once the speed of the car is increased to the flight speed of a Profound Warrior, the frequency of accidents will definitely increase many times."

Cheng Han said with a smile, "That makes sense."

He then said seriously, "But I think that as long as we persist in continuous improvement, the speed of the railcar will definitely be far faster than a Profound Warrior's flight in the future, and safety will definitely be guaranteed."

Cheng Han silently recited in his heart: Why can't there be high-speed rail in this world? Let the transmigrator's transformation of the world begin with high-speed rail!

Jie Qing was a little afraid to imagine.

Faster than a Profound Warrior?

That's too exaggerated!

Railcars have been around for over a thousand years, and their speed has always been like this.

But this servant didn't dare to refute, but cleverly echoed, "Your vision sees farther than us, I believe that day will eventually come."

Cheng Han nodded lightly, "It will!"

He smiled again, "Thank you for your trouble today, you can go back first."

As soon as he finished speaking.

"Whoosh! Whoosh!"

A large number of branches rushed over, rolled up the wooden box and placed it on the ground.

Jie Qing saluted respectfully again and drove the crystal energy car away.

The forest returned to silence.

"Click! Click!"

The miniature railcar was still turning in circles.

Cheng Han stared at the model and muttered, "Gray crystal machinery is too bulky, increasing the power will lead to a sharp increase in weight, which is not suitable for serving as high-speed rail power.

"However, the laws of this world are different, and electricity cannot be generated, so the only solution is to start with the internal combustion engine."

Recently.

In the eyes of others, the genius Special Envoy was obsessed with mechanical gadgets, playing with them with relish.

In fact, he officially began the research and development of the world's first internal combustion engine.

This was his idea all along.

It was just that he didn't have time to implement it before.

Now that he had become a Profound Warrior and had a certain amount of power in his hands, he decisively put it on the agenda.

Cheng Han made up his mind, "First set a five-year plan to create a high-power internal combustion engine, and then build a high-speed railway."

He looked up at the sky, his eyes becoming deep, "Powerful power can make machines fly into the sky, ordinary people can fly faster than Profound Warriors, this is the real revolutionary change!"

Once the plane is officially launched, not only the way of life, but even the way of war will undergo a huge change.

For the Wan Hao Clan as a whole, this is undoubtedly a good thing!

Cheng Han turned to look at the wooden box and ordered, "Open it!"

"Whoosh! Whoosh!"

The branches rolled over, easily dismantled the wooden box, and then brought the metal parts over one by one.

Cheng Han buried himself in his work.

An hour later.

A strange sound rang out.

"Boom! Boom!"

Accompanied by a noisy and rhythmic burst, a strange-looking machine, with a metal pipe on it, spewed out billowing black smoke.

It was the test machine of the internal combustion engine.

Cheng Han looked at it with a face full of surprise, "It's a success!"

A dozen seconds later.

"Bang!"

A strange noise suddenly came.

The test machine slowly stopped.

Cheng Han's surprise disappeared, replaced by distress, "Although the test was initially successful, it will take a long time to improve it to be practical.

"Due to the obstruction of crystal energy technology, the internal combustion engine is an unprecedented technology in this world, and the All-Knowing Eye cannot search for too many things from the information ocean, and the deduction efficiency is not high."

He sighed, "It's too hard for me!"

As a beginner Profound Warrior, he was heartbroken for the future of the Wan Hao Clan!

Soon.

Cheng Han found a pen and paper and quickly wrote a letter:

"To the Great Craftsman:

"Today my experiment was successful for the first time, which proves my internal combustion engine theory that the heat generated by combustion can produce powerful power.

"I am very sorry to inform you that you have lost this bet..."

*

Jinshan Palace.

At this moment.

Palace Lord Yun Changshan was quickly reading a stack of letters.

Many of the wording and sentence patterns in them were really difficult for this Profound Overseer to understand.

But in view of the fact that the author of the letter was a remarkable genius, Palace Lord Yun still patiently read on.

"The calorific value is a key indicator, and fuels with higher calorific values can output more powerful power..."

The Profound Overseer muttered in confusion, "What does calorific value mean, and what is power?"

"The internal combustion engine is a power conversion system, and the working process can be divided into four stages, namely intake, compression, power stroke, and exhaust..."

The Profound Overseer was completely confused.

What is this?

Clearly every word on the stationery was known, but when put together, it was completely incomprehensible.

Palace Lord Yun reluctantly read for a while, and was forced to give up.

He shook his head and muttered, "Everyone else thinks that this kid is fooling around, but from his correspondence with the Great Craftsman, there seems to be a bit of a clue!"

Just then.

A Profound Warrior walked over quickly and said respectfully, "Palace Lord, the results of the Profound Array detection are out."

Palace Lord Yun put down the stationery, "Go and take a look."

The Profound Warrior immediately turned around to lead the way.

A minute later.

Inside a stone hall.

The Profound Overseer saw a rather large and strange illusion, more than twenty meters in radius, hovering above a huge Profound Array.

Upon closer observation, streams of light constantly flowed along the veins in the illusion.

The Profound Warrior's tone revealed a sense of amazement, "Thousands of Spirit Oak Demons have established an extremely complex root network, extending to a depth of more than five hundred meters.

"This 'Returning Origin Spirit Exploration Profound Array' shows that there are extremely mysterious extraordinary fluctuations between the roots, which seem to have some kind of communication with the Divine Banyan Tree..."

This person talked on and on for a long time, and finally praised, "I can be sure that the Special Envoy is studying a remarkable Profound Art."

The "remarkable" in it was obviously a very high praise.

Palace Lord Yun stared fixedly for a few seconds, and nodded, "It's really a bit interesting!"

He then chuckled, "The entire Profound Palace thinks that this kid is not cultivating properly, and is only tinkering with some inexplicable things, but in fact, this kid is busier than anyone else."

This Palace Lord cleverly concealed a little bit, he did not see what this experiment was about.

There was no way.

Even a Profound Overseer has times when his strength is exhausted.

At the beginning, Palace Lord Yun used secret methods but failed to recognize the Spirit Mist Myriad Forest Profound Seal, and even secretly instructed his subordinates to find out its name.

As for Cheng Han's experiment, he only judged that it was related to the Spirit Mist Myriad Forest Profound Seal.

Palace Lord Yun looked at a Profound Master and ordered decisively, "Hall Master Pei, in the future, whenever Special Envoy Cheng has any needs, be sure to give priority to supplying them!"

According to the most simple logic, things that even a dignified Profound Overseer can't understand must be unimaginably good things.

That being the case, of course, we must give strong support.

Hall Master Pei immediately responded, "Yes!"

The surrounding group of Profound Warriors immediately understood that from this moment on, Special Envoy Cheng's status in the Profound Palace had risen a lot compared to the past.

This time is really not short.