Zhang Jun sat in the dragon bowl presented by Zeng Fan, and Huaiwang Zeng Yan, Feng Feng, Ouyang Ye, Xie Xianren, along the way there were talking and laughing, and constantly learning some special knowledge, Huaiwang has unique insights on Xuanwu Mirror and Huang Wujing, and everyone has benefited a lot. Xie Xianren's alchemy and medical skills, Zhang Jun was very interested, and he was simply fascinated by it.

In the end, Zhang Jun proposed to each of the four people in the car to bow three times, and recognized them as the registered disciples of the four, and the four of them agreed very happily after discussion.

Originally, Feng Feng intended to accept Zhang Jun as an apprentice, but he was preempted by his senior brother Guo Yangming.

Ouyang Ye and Zhang Jun were the first to have a master and apprentice, and they had already taught Zhang Jun the art of refining weapons.

The relationship between Huaiwang Zeng Yan and Zhang Jun has long been determined, and it is just a formality.

Xie Xianren's ability to bring the dead back to life has already made Zhang Jun miss, and Xie Xianren also values Zhang Jun's talent, so the four of them agreed to Zhang Jun's apprenticeship overnight.

This is perhaps the simplest apprenticeship ritual in the entire Red Blood Country. Fortunately, the martial arts world looks at form very lightly.

Zeng Fan gave Zhang Jun the best 20,000 superb "unicorn horses", and the journey of 3,000 miles galloped to the oil refining valley in just one day.

Between the mountains, a huge and vast valley lies in the middle of the mountains, tens of thousands of red-blooded national iron horsemen are guarding the only valley mouth inside and outside, the valley is thick smoke, half of the sky is covered by smoke, dozens of miles away from the valley mouth, has been smoked by a pungent smell. The environment here is extremely harsh, and if it were not in the primeval forest, I am afraid that the impact would be even greater.

Zhang Jun called the communications officer and ordered everyone to make simple gas masks on the spot, and cover their noses with three layers of cloth dipped in water before breathing. Everyone felt a lot better.

Not long after, the two captains guarding the valley came to visit, Zhang Jun's status as the dean of Dongshan Academy is detached, not to mention that the emperor's uncle Huaiwang Zeng Yan, the sect master of the refining sect Ouyang Ye, the valley lord of the Medicine King Valley, Xie Xianren, these big people, they have not seen a big man for many years, and today they actually organized a group to visit the oil refining valley, which made the two masters honestly afraid, for fear that there would be a mistake and lose their heads.

When they saw a group of bigwigs talking and laughing around a young man, and the young man was the leader of this group of people, the two captains were completely dumbfounded.

"What are you doing in a daze, this young genius is Zhang Jun, the dean of Dongshan Academy, why don't you come and see him?" King Huai angrily scolded the dumbfounded two.

"After the two masters, you can get along with me without vulgarity, Master Zeng, just forgive them"

"My good apprentices have said it, can I still punish them? Haha, lead the way. ”

In the oil refining valley within a radius of thousands of miles, at least 300,000 craftsmen live in a harsh environment, oil refining is a high-risk industry, and the remuneration of craftsmen is very high, and the remuneration at the end of three years is basically enough for ordinary people to live for a lifetime.

Zhang Jun and others first came to the oil pool, it turned out to be a natural lake, the black and red liquid flowing in the whole lake is the fire oil, it turns out that this is a natural oil lake with a radius of 100 miles, there are inexhaustible raw materials, and the fire oil is still gushing up from the ground. Zhang Jun estimates that the yield of this oil lake will not be less than that of the entire Persian Gulf on Earth.

Returning from the oil lake and coming to the oil refinery, this is the focus of Zhang Jun's observation.

I saw dozens of waterwheels on the oil lake, putting the oil into the air, through a long pipeline, into different oil refining tripods, after high temperature heating, to get hot oil, cooled and then transported to various places with fired vats.

After Zhang Jun saw the details of refining, he secretly scolded "these losers' things" in his heart.

It turned out that the most important and valuable thing of oil refining was ruthlessly abandoned by them.

The technology of the earth is ten times and a hundred times stronger than that of the people of the colorful world.

Oil refining, to put it simply, is by heating the oil, and then the decomposition at each temperature is different, the highest decomposition is liquefied petroleum gas, the slightly lower decomposition is gasoline, then kerosene, diesel, heavy oil, etc., and finally the petroleum asphalt is left.

These foolish craftsmen refined the lowest-value heavy oil and bitumen and sold it as kerosene. And liquefied petroleum gas, gasoline, kerosene, diesel, the four most valuable things, natural gas and gasoline were volatilized into the air, kerosene, diesel were thrown into the far pit.

Zhang Jun found the disadvantage of the original refining, that is, there was no cooling system and could not be received in layers.

Zhang Jun spent two days drawing several drawings, all of which were cooling receiving systems, precipitating different oils at different temperature stages. With current technology, there is no way to store natural gas, but it can be received and used to refine red oil, which is a recycling system.

Zhang Jun can only use gasoline now, but kerosene and diesel can be stored, and they will definitely be used in the future. A dense and compact low-lying mountain was found, and two huge natural basements for the storage of diesel fuel and heavy oil were built.

The craftsmen brought by Zhang Jun went to complete the tasks assigned by Zhang Jun in batches, and three days later, the simple double-layer cooling device of outer porcelain and inner steel was successfully refined. Two days later, the tank in which the gasoline was stored was successfully refined, and on the same day, samples of the Thunder Cannon and gasoline* were also molded. It's just time to refine gasoline and diesel.

Zhang Jun lit the red oil pot, and after a while, natural gas flowed out from the uppermost end of the cooling pipe, and the natural gas encountered the more fierce refining red oil under the pot.

Soon, natural gas, gasoline, diesel, and heavy oil were accepted separately in different cooling tanks, and the simple oil refining unit was successful. The small traders and peddlers who steal oil on the planet know how to make money by refining oil. How could it be difficult for our big scientists----- weapons designers of the Academy of Military Sciences.

Zhang Jun put the refined gasoline and blades, steel slag into the thunder cannon and gasoline*, because there is no * lead into a problem, Zhang Jun turned the * in the lead into a heavy oil rope, although the effect is not as good as *, but it can also be used. 、

After the three crossbows were full, they aimed at a forest thousands of feet away, and with a "whoosh" sound, the arrows were like a streamer with ignited thunder cannons, heading straight for the target thousands of miles away.

With a loud "boom", the woods thousands of zhang away suddenly turned into a sea of fire, and a radius of dozens of zhang was instantly ignited, and the towering giant tree was burned with a crackling sound. In a short time, the giant tree burned to ashes.

All the visitors were stunned on the spot with wide eyes, no one thought that the power of the thunder cannon would be so great, even Zhang Jun did not expect that it could burn a range of tens of meters at most on the earth, and it could reach such a large scale as a radius of dozens of zhang in the Colorful Continent. Fortunately, the nearby flowers and trees were cut down in advance, leaving only a few giant trees within a few tens of feet, and it was a big sin to set fire to the primeval forest.

I tested the power of the small Thunder Cannon and Gasoline* again, and the results were also amazing. It's just that the gasoline * lead is a bit long, and it only explodes about five seconds after landing, and there is a danger of being thrown back, so the lead is improved, and it fully meets Zhang Jun's requirements after testing it again.

"With the royal gold medal in my hand, I will gather all the skilled craftsmen in the nearby city, according to the drawings, and keep rushing to make various devices of thunder artillery and gasoline*, and send them to the military camp of the emperor's army in batches, and this matter will be supervised by the two of you, and after completing the task, I will reward you two with the emperor." ”

"In addition, all the craftsmen I brought with me must complete all the oil refineries with cooling devices and oil storage tanks within five days, and mobilize the troops and manpower of the nearby cities to send the oil storage tanks to the barracks of the emperor's army day and night. Pay attention to fire prevention, and each oil storage tank must have a fireproof quilt to prevent fire. Remember, remember," Zhang Jun handed the royal gold medal to the two captains, and after giving an explanation, he left the Oil Refining Valley with everyone except the craftsmen and went straight to the direction of Chiyan Pass.

The two captains couldn't hide their smiles, looked at each other and laughed. I didn't expect the pie in the sky to hit the two of them. Usually there is a rare opportunity to perform, but now that there is a ready-made promotion opportunity in front of you, how can you not work hard to do things.

Zhang Jun and the four masters sat in the dragon bowl, discussing the experience of various stages of martial arts cultivation along the way, especially the experience of refining weapons and alchemy, Zhang Jun especially listened carefully.

Along the way, the four masters simply admired Zhang Jun's comprehension and memory, and never forgot his memory at a glance.

The four masters gave Zhang Jun a lot of good things, and Zhang Jun also gave them a piece of each of them after the black corpse insect body they needed most. Everyone rejoices when he has his needs.

Ten days later, the naked eye could already see the military camp stretching for hundreds of miles, traversing between the continuous mountains, surrounding the entire valley, and in the valley was the besieged Yunyang State's tens of millions of troops.

Zhang Jun has been sitting in the dragon bowl these days and has not stopped cultivating, and the Sun Divine Skill is running all the time.

Refining, alchemy, and refining medicine are all related to fire, Zhang Jun's sun magic is the purest power of flame, whether it is when he comes to the oil refining valley or when he returns to the barracks, Zhang Jun lifts the cloth curtain and bead curtain on the dragon where he sits and bathes in the sun.

In the more than 20 days since he cultivated the Sun Divine Skill, Zhang Jun has completely eliminated the damage to his skin caused by the Double Yang Explosion, although the damage was not great before, but it would itch after a long time in the sun.

Now not only does it not feel itching, but it seems to be bathing and baptizing all the time, and Zhang Jun feels more comfortable under the sun's essence bath, which has become a unique enjoyment.

Zhang Jun also discovered an even stranger phenomenon, not only can absorb the essence of the sun, but also absorb the essence of flame and heat from the flame and heat energy. Absorbing the flame essence should be related to the Earth Fire Burning Heaven Skill, after all, the refining sect that created this exercise is to absorb the magma flame essence. But the invisible and intangible, heat essence can also be absorbed, and Zhang Jun can't understand it.

If the four teachers knew that Zhang Jun's self-created set of Sun Divine Skills did not need to be deliberately cultivated, and could increase their cultivation anytime and anywhere, they were afraid that their jaws would drop in shock. If they are killed, they will not believe that the people of Ming Wujing can actually create their own exercises, and they are still such magical exercises.

After more than ten days of uninterrupted absorption of the sun essence, flame essence, and heat energy essence, the five-fold cultivation of the Mingwu Mirror has already reached its peak, and it is only a glimmer of opportunity and a little enlightenment. You can break through the shackles and advance to the sixfold level of the Ming Martial Mirror. The aura required for this advancement was all from the autonomous operation of the Sun Divine Skill, and not a single spar was wasted. It's not that Zhang Jun lacks spars, it's just that this endless huge consumption, sooner or later, there will be a time when he can't afford it. Zhang Jun is just blazing a new trail for himself.