"Space Gate?" Xu Yang understood when he heard this name.

In the golden age, the vast land and a huge country with a territory of hundreds of millions of miles, how can it manage its territory? If you rely solely on ancient Pegasus, pigeons and other communication methods, you may be afraid that the incident on the border will be transmitted to Kyoto after half a year of the incident.

Therefore, the sound transmission array and the teleportation array came into being. The former is not bad, but it is a small formation, and it consumes little resources each time it starts. However, the latter teleportation array is much more expensive to use.

Although the teleportation array and the [Human Escape Array] carried by Xu Yang have certain commonalities in the array pattern, there are still certain differences in use.

The human escape array is carried with you. You can record a certain location. After a very short period of preparation, you can escape into the area in the record. It is suitable for small-scale and close-range teleportation.

The space door is a large formation fixed in a certain place and needs a long time of preparation before it can be opened. At the end of the space door, there must be another space door for teleportation.

Generally, after the battle between major upper countries, after capturing a certain city, it will destroy the space gate immediately to control the city. Of course, civilian troops are generally cannon fodder, and there are fewer such siege battles. If you want to destroy a upper country, the most important thing is to kill the emperor and princes in the enemy country, so that the enemy country will collapse without fighting.

Large "domain doors" that are one floor higher than space doors can position many subspace doors. Generally, small space doors can only position one direction, while domain doors can position tens of thousands of directions.

In Haiyun Shangguo, there are thousands of space gates, but there are no more than ten domain gates. For example, Haiyun Imperial City, there is a large domain gate, which is located thousands of small space gates and can be teleported to the thousands of large cities. The small space gates cannot be teleported between each other, and they can only teleport to the domain gate of Haiyun Imperial City.

Xu Yang understood that if he was in danger and crushed the jade talisman, his master Luo Baishui would rush from the Domain Gate of Haiyun Imperial City to Qingqiu City, and then rushed to the area where he was in danger as quickly as possible.

"With this jade talisman, my safety has been greatly improved, but you must also know that it cannot be entirely up to the master. After all, it will take half an hour for him to come. Within half an hour, many things will be enough to happen. Someone plotted against me on this trip, so you must be particularly vigilant." Xu Yang came out of Luo Baishui and walked towards the general manager's residence, thinking to himself.

"What? Did you choose to go to the dangerous area Qingqiu?" The manager in charge of registration looked up in surprise. He found that it was Xu Yang and said relievedly, "It turned out to be you... No wonder, your combat power exceeds that of the same class, and it doesn't make it interesting to go to the ordinary area again... OK, I'll register now."

Xu Yang asked softly: "Sir, I wonder if I can check the trial area chosen by other students?"

The manager shook his head and said, "It's impossible. All the trial areas chosen by the students are kept confidential."

Xu Yang just confirmed it and nodded and thanked.

The manager handed over a token. The words "Qingqiu" are engraved on it: "If you hold this jade plaque, you can go to the west area of ​​the imperial city and look for the guards of the territory gate. When they see this jade plaque, they will naturally teleport you over."

Xu Yang thanked him and put away the jade token and returned.

Back in the courtyard, Xu Yang cleaned up a little and saw Yu Xuanyu knocking in.

"Xu Yang, I'm going to go to the Hogfeng Valley trial. Where did you choose?"

Xu Yang smiled and lit up the jade plaque "Qingqiu" in Liang's hand.

"Okay. It seems that you are really unwilling to go to the ordinary area, so I wish you a good trip," Yu Xuanyu shrugged, "By the way, I heard from others that Yan Yu also chose the dangerous area. She would not choose the same area as you."

Xu Yang smiled and said, "It's possible, but it has nothing to do with me."

"You have to be careful," Yu Xuanyu said, "Yan Yu... I always feel something is wrong."

"wrong?"

"Yes, I have noticed it several times. In front of the deputy director of the Han Xingsha, she treated the so-called "guards" men with coldness, but she was carrying the Vice Director of the Han, and she seemed to have changed her own. Although she still talked very little, she had a smile on her eyebrows and eyes, which was not the way she would keep people from thousands of miles away. So, I think this person is very hypocritical." Yu Xuanyu said seriously.

Xu Yang laughed: "Everyone has his own way of doing things, and it's understandable to be hypocritical. Anyway, Yan Yu and I don't have much interaction. What does it have to do with me whether she is good or bad?"

Yu Xuanyu was not used to talking behind her back. She just cared about Xu Yang and said a few more words.

The two walked all the way out of Yundu Gate, galloped for dozens of miles, and arrived at Haiyun Imperial City.

The prosperity of the imperial city is incomparable to even the clouds. Yu Xuanyu wanted to visit Haiyun Imperial City, but Xu Yang was worried about repairing clothes in his heart, so he did not agree.

When we arrived at the western area of ​​the Imperial City, there were fewer pedestrians, and teams of black-armored soldiers patrolled. These people were all in the cultivation level of Xuanshi. Judging from their fierce aura, their combat power was quite strong.

Xu Yang and Yu Xuanyu stepped forward and handed over the jade plaque. After checking the test, they ordered two soldiers to take Xu Yang and others to the Domain Gate.

"This...is the large domain gate in the space gate?"

When they arrived at the foot of the Domain Gate, Yu Xuanyu and Xu Yang were slightly stunned.

This is a huge portal up to 6 meters high, but without a door leaf. In the middle is a huge black vortex, rotating constantly, like a ruthless giant black pupil, staring at people coldly.

The person in charge of the teleportation of the Domain Sect was a master of Xuanzong. His face was cold and solemn. After checking the jade tokens, he took away the jade tokens and sent them to the new jade tokens again.

Xu Yang took it and saw the three big words "Haiyuncheng" engraved on it.

"If you need to return, hold this jade plaque, go to any space gate, and sign up to teleport." The accompanying soldier explained.

"Thank you." Xu Yang said to the Xuanshi-level soldier, then smiled and said to Yu Xuanyu: "Xuanyu, I will take one step first. At least one month or three months, I will come back. I will see you whenever I see you."

Yu Xuanyu twitched her delicate little nose, her eyes were a little red, and she snorted and said, "Okay, don't be like going to die. Just a trial, what's the big deal?"

Xu Yang laughed. He didn't tell Yu Xuanyu that someone had plotted against him, but he was just worried that the long-legged beauty would be anxious.

"This master, please send me to Qingqiu City." Xu Yang bowed and stepped into the black vortex of the Domain Sect in one step.

The master of Xuanzong nodded slightly, then pinched the seal with his hands like a butterfly, and a line of white light shot into the formation pattern on the border of the domain gate.

With a bang, Xu Yang's figure disappeared. (To be continued, please search for Astronomy, the novel is better, updated and faster!
Chapter completed!