In Lin Xiao's previous life, there was a three-hundred-year dynastic cycle theory, which means that when an ancient dynasty reaches about three hundred years, it will be overthrown due to land annexation and decay, and it is rare to have more than three hundred years.

There is no such problem in this world of cultivating immortals, but there is also a three-hundred-year cycle theory, this cycle is related to demon beasts, in terms of reproductive ability, demon beasts are stronger than human races, human races are in a lifetime, and it is already too much to give birth to ten or eight offspring, and some demon beasts living in groups, one hundred and eighty is considered less, and thousands are normal.

As soon as the number of demon beasts is large, the carrying capacity of the land spirit vein will be exceeded, the resources will become tight, and it will be easier to challenge the status of high-level demon beasts, so after reaching the sixth order, the demon king, after already having the wisdom that is not weaker than the human race, will find ways to weaken the number of demon beasts, and the best way is to launch a beast tide.

Therefore, in the world of cultivating immortals, except for the Central Continent, the demon beasts in each continent will have beast tides of different sizes every three hundred years or so, and the monks have long been accustomed to this law.

Nanzhou, the southwest line, is the front line of the human race, the first line of Annan and Wusun countries, the demon beasts began to move, and the two countries suffered heavy losses in the decades-long battle of demon cultivation, which made the two countries very nervous.

Especially in the country of Annan, as a country rebuilt after the war, there are not even 100,000 monks in the country, not to mention Lingguang monks, not even a few Daogang monks.

However, the countries did not dare to help the war easily, and the Triangle Demon King was known for its speed, not to mention the Spiritual Light Period, even if it was the Divine Void Period, it might not be able to contain it.

Annan had no choice but to gather people and prepare to stick to a few spiritual mountains, and decades of development were interrupted, and I don't know how much financial resources will be lost.

Wusun Kingdom, the strength of the Sun family has decreased sharply before, and it has only gained a chance to breathe by renting out the Nether Cave and cooperating with the Wu Kingdom, but now it still has not recovered its strength, making the powerful Wusun Kingdom lame, and even the Wu family is not willing to work too hard to prevent the decline of its overlord family.

As a result, the Wusun Kingdom also adopted a passive stubborn strategy, and at the same time increased the storage of materials, which definitely consumed this beast tide, and the Wusun Kingdom was already considered a big country at the southwest end, and they were like this, not to mention the rest of the small countries, and the morale of the human race was rapidly decreasing.

However, on the front line of the Martial Kingdom, it is a different scene, Nanxuan's wild strategy has been rewarded best, for tens of hundreds of years, Nanxuan has migrated more than 100,000 monks to the border of the Martial Kingdom, although the cultivation of these monks is not high, but a larger number of descendants have been born, these people want to obtain resources to cultivate, they need to hunt demon beasts.

Therefore, this area has always been the most active area of the human race, and countless demon beasts are killed every year, which also makes the demon beasts on the territory of the Purple-Eyed Demon King have not exceeded and remained in a balanced state.

In addition, the last time Lin Xiao raided the purple-eyed demon king, he almost killed it, which left a big shadow in his heart, and this time the beast tide, the purple-eyed demon king did not move at all.

There was no change in the wilderness, but Wuguo got a huge opportunity for development, all said that war is the best catalyst, all over the country began to prepare for war, reserve resources, and brought a large number of orders to the Wuguo factory, like snowflakes, the orders far exceeded the production capacity of the Wuguo factory, so Xiaoyangshan began to split, a branch factory was established, a large number of loose repairs were absorbed, and countless Dan Fu array products were continuously produced.

Xizhou, the situation in Xizhou is not very good, after the Wuguo firm entered the Xizhou Qin State, breaking the balance of Xizhou, as the Wuguo factory became more and more sophisticated, the price of products has been decreasing, it has been almost about seventy percent of the original, the Qin royal firm began to dump to the rest of the big countries, and the national strength of the Qin State has been greatly developed.

After the development, the Qin State did not rest on its laurels, and repeatedly used troops against the wilderness, pushing the front line of the wilderness, which made the Xizhou Demon Clan very angry, although it did not develop millions of beast tides, but tens of thousands of beast tides of hundreds of thousands of scales have always existed, and wars are frequent.

The rest of the countries in Xizhou were exploited by the Qin State, and they were already dissatisfied with the royal business of the Qin State, and when the beast tide in the rest of the regions occurred, they intended to guide in the direction of the Qin State, which made the situation in Xizhou suddenly tense.

The Qin Emperor also showed a different kind of courage, and wanted to take the opportunity to expand his territory, so he began to prepare for the war, and flew to Wuguo with an order like a snowflake.

The Luo Xinghai Islands, the first line of defense, gathered hundreds of thousands of monks in the Luo Xinghai Sea at this time, because the three-hundred-year-old beast tide was about to happen again.

However, according to the law, this is a small beast tide, and the small beast tide is an opportunity to make a fortune for the Luo Xinghai Islands, as long as a large number of demon kings in the deep sea do not come out, the human race will have the upper hand, and countless forces and scattered cultivators will come to hunt demon beasts.

Wind and Fire Island and Wanhua Island monks are also among them, after hundreds of years of development, Wind and Fire Island has more than 10,000 people, although the entire island has been developed, it is still difficult to feed so many monks, going to sea and adventuring has become the biggest means for many monks to obtain resources, how can you miss this opportunity.

Beizhou, the last time the beast tide in Beizhou was 800 years ago, in Beizhou, the beast tide has nothing to do with 300 years, because the climate and region of Beizhou are more special.

The entire Beizhou is the world of ice and snow demon beasts, their ability to reproduce offspring is not strong, and they don't like the hot and humid climate, they only like the ice and snow, whether the beast tide occurs or not, and the activities of the human monks are related.

The Terran is a very expansive race, and the same is true for the Beizhou monks, with the Ice and Snow Divine Palace as the boundary, the Terran monks have been moving northward, moving the front line of the Terrans, but when it comes to the core interests of the Ice and Snow Demon Beasts, those demon beasts will launch a beast tide and drive the Terrans back.

At this time, unless it is a large support from Central Continent, it will be difficult to gain a foothold, so the situation in Beizhou is easier to repeat and more complicated than that in Xizhou.

A few years ago, Su Yuzong attacked the lair of the assassin god, the god lord fled and entered the depths of the Beizhou wilderness, the human race was in the territory of the demon clan, so it was naturally going to be besieged, and the god lord was extremely miserable, and fought with many demon kings of the eighth realm.

The battle of the Eighth Realm Ancestor was extremely dynamic, and within a hundred miles, there was danger in the Divine Void Period, let alone low-level demon beasts, so those low-level demon beasts suffered heavy casualties, more than 100,000 demon beasts were killed, and many of these demon beasts were direct descendants of the major demon kings.

So after a few years of brewing, the Beizhou Demon Clan launched a very large-scale beast tide, and the front-line monks moved south one after another, blocking the demon beasts on the front line of the Ice and Snow Divine Palace, and the Ice and Snow Divine Palace flew to the large sects in the northern part of Central Continent several letters of help a day.

However, the major sects do not pay attention, they are familiar with the habits of the demon beasts in Beizhou, as long as there is no large-scale natural disaster in Beizhou, those demon clans will not break into the realm of the Middle Continent, and even the Ice and Snow Divine Palace will not break through, as long as the human race is driven away, so the situation will never be as serious as the Ice and Snow Divine Palace said.

Dongzhou, Dongzhou is the only continent that does not border Zhongzhou, far beyond the East China Sea, and the closest place to Zhongzhou is more than 500,000 li.

The territory of Dongzhou is extremely vast, how big it is, it is not known, the human race only occupies a small part of the territory, and this is still the situation of Penglai for hundreds of thousands of years of continuous attacks on the East Sea Demon Clan, if it is the same as hundreds of thousands of years, the sea area is not passable, and the situation in Dongzhou is even more miserable.

Although there are dozens of countries here, it is the five major forces that can control the Central Continent, and it is also the five major academies, also known as the Five Elements Academy.

The academy system is the characteristic of Dongzhou, and the monks of Dongzhou are the most radical, and they have always believed that the way of heaven favors the human race, and the human race is the overlord of this world, and it is necessary to exterminate all the demon races and open up space for the development and growth of the human race.

Therefore, the purpose of the establishment of Dongzhou Academy was to educate the people, so that the people can cultivate immortals, this move also greatly stimulated the enthusiasm of the human race to cultivate immortals, and there are countless such colleges under the command of the five major academies, all of which are regarded as their vassals, and cultivate low-level monks for the five major academies, only those low-level monks who have reached a certain level of cultivation can be promoted to a higher level of academy to study.

The academic school is the most proficient, and all kinds of inheritances of exercises, martial arts, and Dan Fu Array are willing to be taught, which makes Dongzhou Immortal Cultivation Realm Although there are not many top masters, there are many middle-level masters.

The Dongzhou Immortal Cultivation Realm has been developing and growing for thousands of years, constantly moving the front line, eliminating countless demon clans, and the reason for the occurrence of the beast tide this time is that a monk killed a sixth-order Kui Niu, Kui Niu is the bloodline of the ancient divine beast, and it is the hegemon in Dongzhou.

And the Kui Niu is not abundant, a total of about 100,000 heads, their advancement is even more difficult, they need to purify the bloodline to advance, this sixth-order Kui Niu is a direct descendant of a supreme level Kui Niu, its killing is like stabbing a hornet's nest.

Supreme Kui Niu was furious and summoned six eighth-order demon kings and more than thirty seventh-order demon kings to discuss together to kill all the monks of Dongzhou and completely wipe out the power of the human race in Dongzhou.

Suddenly, more than a billion demon beasts poured out of the wilderness and headed for the Dongzhou Immortal Cultivation Realm, and after the five major academies learned the news, the high-level cultivators were shocked and desperate in their hearts.

But the teachings of the ancestors from generation to generation made them dare not give up low-level disciples and mortals, so they could only fight to the end, and the five major academies abandoned the usual small contradictions, issued announcements, and relocated the people's monks.

The five major academies have prepared six lines of defense on the territory of the human race, which are used to block the demon race and completely delay the time for the human race.

The larger number of monks began to mobilize the people to move northward, constantly going north, as far north as they could, and at the same time building defensive lines every 30,000 li or so, the front-line army would definitely not be able to stop it, and they had to fight and retreat at the same time.

At the same time, the situation in Dongzhou has also spread to various places with the disciples who have traveled in Zhongzhou, telling the tragic situation on the front line, wanting the support of the Zhongzhou Sect, there is no supreme in Dongzhou, and the supreme demon king must appear in order to contain Kui Niu.