"Swish swish" the blood crystals turned into streams of light and entered the land of Yanjing. As soon as these blood crystals entered, everyone felt that the source stones sunken under the land suddenly lit up, and small formations began to form. The core of these small formations was these blood crystals. When all the small formations were stimulated, they formed a huge formation, covering the entire Yanjing. At this time, Lin Xuan needed to be more careful, because once the position of the blood crystal was incorrect, the formation could not be stimulated.

Gradually the sun sets west again. Lin Xuan has been setting up the formation for two days. Now it has reached the final stage of setting up the formation. After all, Yanjing is very large and the span of this formation is also very large. It takes two days to be considered as the Daoyuan formation. It takes several months for the Daoyuan to be fully arranged even if the city is the smallest city. It takes several years for those big cities to be continuously improved.

At this time, everyone's emotions became nervous. Now it was the last moment. If this formation was really as useful as described before, it would indeed help them solve their worries. Their group of heavenly realms had more or less related to the Dragon Group and often ran around for the country. Among this group of people, even the three clan elders of the Xuanyuan Tribe were very concerned about the lives of ordinary people. After all, the clan elders of the Xuanyuan Tribe have observed the outside world for generations, and they often took on tasks of the Dragon Group during this period of time. There was nothing they needed in the Dragon Group's military library, but they were just doing some things themselves. Those who didn't care about ordinary cultivators generally would not join the Dragon Group.

So when the catastrophe came, there was a pure land protecting ordinary people and allowing them to fight outside with peace of mind. Lin Xuan asked Daoyuan for a city protection formation, which was the same idea. Because what kind of things will happen in the future will be unknown, Lin Xuan also had to be fully prepared. Now Lin Xuan can only do his best to do his best and leave his will. He will do everything he can do, but Lin Xuan was not sure whether he could protect ordinary people.

After all, Lin Xuan had never seen those aliens, but had only fought with puppets. He only heard from Daoyuan's mouth. However, that was also the extraterritorial civilization ten thousand years ago. Although ten thousand years were nothing to cultivators in the heaven realm, it would have made some progress for a civilization. Moreover, they have been fighting with the Dao Realm for so many years. War is a catalyst for promoting the evolution of civilization. The progress of a calm civilization is very slow, but a civilization with war will be very rapid in its development.

Of course, if a civilization is unilaterally massacred, it is another matter. When both sides are evenly matched, the Earth is naturally pride in promoting the progress of weapon technology on both sides. However, Lin Xuan knew that there was a scientific and technological civilization outside. Although that civilization was to help Lin Xuan and the others, Lin Xuan could be sure that the technological level of scientific and technological civilization will definitely be much higher than that of the Earth. These civilizations will usually fight each other openly and secretly. In their eyes, the technology will definitely be much smarter than the Earth. At that time, the Earth's weapons and troops may not be worth mentioning in foreign civilizations, and the troops will suffer large-scale casualties and injuries.

But Lin Xuan had no choice but to deal with the military affairs. Lin Xuan could not make weapons, nor could Dao Yuan. He could refine weapons, but it was really difficult for Dao Yuan to make a hot weapon. Dao Yuan had several high-tech weapons on him at the beginning, but it was directly given to him by the technological civilization, so he would not make them himself.

However, I heard that in addition to practicing to break through the heavenly realm during this period, scholars are helping to transform weapons. Many weapons in the Dragon Group are much higher than those equipped by ordinary army troops. However, the materials used by those weapons are too expensive and do not have the ability to popularize them. The silver bullets used by the practitioners to protect the body are more expensive than a rifle. That thing is a special alloy, not just metal silver. This alloy dragon group cannot be mass-produced. Most of the weapons of the Dragon Group are made of this precious and special material. The output on the earth is basically produced in parallel space, but these metal materials are very rare even in parallel space.

"Start up" Lin Xuan's body was flashing with a golden light, and a slight thought in his heart. At this moment, all the formations suddenly formed into one piece, forming a city-protecting formation covering the entire Yanjing. This formation was extremely huge, and with Lin Xuan's pressure, it could not be seen at all, that is, it could be completely covered with the mental power of the heavenly realm level, so he has been closing his eyes until now. During the period of setting up the formation, Lin Xuan has always used his mental power to calculate and guide the formation.

"Buzz" At this moment, the source energy between heaven and earth suddenly fluctuated, as if a large mouth was swallowing the surrounding source energy. The source energy in Yanjing City rose by several levels. Soon, the huge formation lit up slightly, and then it became silent and stopped appearing. Lin Xuan is now holding an octagonal prism in his palm. This prism is the core of this formation. This octagonal prism was specially refined by Lin Xuan for this formation. Combined with this Yanjing city protection formation, it is enough to be comparable to a magic weapon. After all, this formation is very comprehensive, capable of attacking, defending and reconnaissance. Moreover, after Lin Xuan's upgrade, the density of Yanjing's source energy has increased a lot, which is very suitable for cultivators to practice and the growth of animals and plants. The environment in Yanjing will get better and better in the future.

At this time, other Tian Realm masters who were watching also felt that they were subject to certain restrictions in this formation. Not to mention anything else, if they forcefully observe Yanjing, their mental power would be limited. This is also part of the defensive formation. The more they need, the more powerful the cultivator is, the more powerful it is.

If a cultivator wants to destroy Yanjing, he will be noticed by the formation as soon as possible and will defend and strengthen the area around the cultivator. At the same time, he will attack the cultivator. If he has a full blown attack, he is enough to compete with the power of the second grade of the Heavenly Realm. This is the terrifying point of this formation. Now no cultivator on earth wants to break through this formation. This is also the most powerful protective umbrella for China. There will be no such formation. There is no more blood crystals in the half-step heavenly realm monster. The area of ​​Yanjing City does not consume a lot of blood crystals this time. It is meaningless to arrange such a formation. Nuclear weapons cannot enter even if they hit it.

Lin Xuan breathed a sigh of relief and stood up in the air. Now Yanjing's formation has no restrictions on Lin Xuan. After all, the control center of the formation is in Lin Xuan's hands, but this control center Lin Xuan will not stay in his hands. This thing must be handed over. Under Lin Xuan's design, this control center can even be controlled by ordinary people. Otherwise, there is a mirror on it, and it will be like playing a game. When controlling, Yanjing will appear above the mirror like a three-dimensional image. It is still very simple to control. For those people, it is similar to the most advanced control system now.
Chapter completed!