In view of the failure of the first operation, Zhu Ran, the sect leader of the Heavenly Martial Sect, thought that it was unwise to attack the Central Domain first, although the Central Region was rich in resources, it was also the most powerful of the four domains.

In recent years, Zhu Ran has continuously sent his secret guard organization "Black Guard" to secretly infiltrate the major forces to collect espionage intelligence, and at present, Zhu Ran's secret guard has a clear grasp of the strength of the forces in various domains.

According to the statistics of the Secret Guard Organization, there are currently more than 100 sect forces in the Central Domain, among which Huayang Sect, the second largest super sect in the Immortal Cultivation Realm, which has the ability to conduct a comprehensive confrontation with Tianwu Sect, is located in the Cloud Mist Mountain Range in the Central Domain, Huayang Sect and Tianwu Sect are the same, they also have the Taishang Ancestor of the Transformation Period, and there is also an ancestor at the peak of the late Yuanying Stage, although the other Yuanying Monks are only one-fifth of the Tianwu Sect, but the Huayang Sect has the ability to destroy the Tianwu Sect cannot be denied, so the two sides have always aimed at destroying each other, and the competition between the two sides in the Xuanyuan Continent is becoming increasingly fierce, especially when the Tianwu Sect wanted to forcibly annex the Yunxia Gate, which was located in the Eastern Regions and the Tianwu Sect was often opposed, it was strongly intervened and intervened by the Huayang Sect, and the Tianwu Sect did not take advantage of it, and in the end it had to be stopped.

At present, according to Zhu Ran's plan, the Tianwu Sect gave up attacking the Central Domain so as not to overstimulate the Huayang Sect, which is an unwise approach, and turned to attack the other three domains.

For the other three regions in addition to the middle region, Tianwu Sect after careful discussion, believes that the West Plains are rich in resources but relatively weak, Tianwu Sect can lightning tactics to quickly control the West Plains, not to give the Xiu Immortal Alliance time to rescue, and the West Plains will also be used as the resource supply base of the Tianwu Sect, and then in the Tu Nan Wilderness, although the South Wilderness is not as rich in resources as the West Plains, but the excellent geographical location is definitely a place for soldiers to fight, as for the impoverished North Regions, the Tianwu Sect currently has no plan to attack the North Regions, and the Tianwu Sect finally established the West Plains and the South Wilderness as a breakthrough to advance。

Since the Tianwu Sect did not pay much attention to the Northern Regions, it would be rare for the Northern Regions to usher in a period of relative peace.

In the Beiyuan City Lord's Mansion, after listening to the report of his subordinates, Zhao Yuanchun's nerves, which had been tense recently, finally relaxed.

According to the reports of his subordinates, the Tianwu Sect is preparing to take the Western Plains and the Southern Wilderness as the main direction of attack, and the Northern Regions will not be affected by the war for a long time.

Thinking of this, Zhao Yuanchun breathed a sigh of relief, only to see him instruct his subordinates with a little seriousness: "Immediately notify Master Qiu Wen's nephew, let him always pay attention to the area bordering the Eastern Regions, and the due defense must not be slackened for this." ”

"Yes, my subordinates obey!"

The guards who knelt in front of Zhao Yuanchun on one knee immediately withdrew from the hall after listening to Zhao Yuanchun's orders, and drove the flying sword in the direction of Taiyuan Sect.

In the sea space, Han Zi finally overcame the obstacles in all aspects of the aero engine and began to enter the practice mode after hard work.

The demon beasts of the Refining Pavilion have also successfully made a model of an aero engine, and the shell of the fighter has been completed.

After successfully using nuclear power generation in space, Han Zi completely replaced the traditional calcium carbide, because the power volt in the calcium carbide storage is not enough to support the test run of the aero engine.

After the demon beasts finished laying the nuclear power system, Han Zi immediately began to instruct the demon beasts of the Refining Pavilion to develop the actual products of the aero engine.

After about a month, the first aero engine was successfully developed, but during the experiment, there was a serious failure, Han Zi carefully checked and analyzed the cause of the failure, and found that it was one of the lines, because it could not withstand the extreme high temperature generated during the experiment and melted.

With this discovery, Han Zi asked the demon beasts to use red gold fused with dark iron as raw materials to process a new line with extremely high heat resistance.

After changing to a new line, Han Zi carefully checked every part of the engine, and after confirming that there was no problem, he conducted a test test again.

When the engine was driven by the powerful electrical energy of nuclear power, it spun at a high speed, and Han Zi carefully analyzed the speed of the engine's rotation.

"Double the speed of sound. ”

"Twice the speed of sound. ”

"Five times the speed of sound. ”

The rotating aero engine finally reached its limit at five times the supersonic speed.

After another three days of continuous experimentation, the first engine was successfully finalized.

When the engine was installed on the fuselage and the fighter was painted with silver paint, Han Zi was very nervous in his heart, praying in his heart that the plane must fly.

Han Zi came to the side of the fighter, climbed up the ladder to the top of the fighter, opened the transparent cover windshield of the cockpit, and entered the interior of the fighter, Han Zi sat in the comfortable cockpit of the plane, looking at the super temperamental design style in the cockpit, Han Zi was very excited.

After Han Zi put on a flight helmet with a new design, he pressed the green button next to it, only to see the windshield slowly close, and then Han Zi pressed the ignition button located in the middle of the steering wheel of the aircraft, and when the ignition button was pressed, he saw two blue flames in the two flame paths at the tail of the silver fighter jet, and blue flames erupted from the tail of the plane.

Han Zi piloted the silver fighter into the pre-designed runway, and ran quickly, after the plane ran quickly for a distance, Han Zi lifted the direction handle upward, only to see the nose of the plane began to puff up, and then the front wheel of the plane was raised.

Boom... The silver fighter let out a roaring sound and flew completely off the ground into the air.

"It worked!"

Han Zi's small team members, as well as the demon beasts who participated in the development of fighter jets in the Cultivation Pavilion, were all looking up at the fighter jets flying high in the air at this moment, cheering and jumping.

Han Zi happily piloted the silver fighter plane to fly high in the space at the moment, tears of joy flowed in her eyes, looking at the altitude of tens of thousands of meters now, Han Zi sighed in her heart: "Her own efforts, she really did not disappoint herself, she wants to say one thing most now, that is, I succeeded!"

Han Zi piloted the silver fighter plane, flew high in the air for an hour, and landed back on the ground.

Looking at the silver fighter in front of her, Han Zi's eyes shone with joy, and she lowered her head slightly and pondered what kind of name she should give the silver fighter.

"If you have it, let's call it Purple One!"

Han Zi suddenly had a big brain, and took out the name of Purple No. 1 for the silver fighter.

When Han Zi drove the Purple No. 1 to land with high spirits, her small team members and the demon beasts involved in the development were stunned by the function of the Purple No. 1 against the sky, although they had been helping Han Zi refine some strange-looking things, but they never knew what the characteristics of these peculiar things were, although Han Zi also explained to them the theoretical program and the application of the functions of the aero engine, but they didn't understand it at all, today they saw it, looking at the Purple No. 1 that was faster than a meteor, they had a bit of a whimsical thought in their hearts: "Can you refine a flying machine without auric energy?"

Han Zi seriously praised the demon beasts who participated in the development of the purple No. 1, and rewarded them very heavily, because the technology of developing fighter jets has been completely mastered by the demon beasts, so Han Zi asked the demon beasts of the Refining Pavilion to hope that they can build twenty fighter jets in half a year, for material resources or something, there is space, I am not afraid that you will waste it, I am afraid that you will not play.