"A large number of advanced variants began to move to the nest center!" the Intelligence Center reported.


    "Good, R73 flying formation goes to war! Target, bring all the captured variants back to Yunzhou base!" Li Tai ordered.


    "Roger that!" a flight formation immediately set out, which was composed of fighters, bombers, early warning aircraft and transport aircraft.


    They moved towards the area of the four groups, because most of the advanced variants were attracted to the center of the insect nest to resist shelling, so there was not much disturbance on the road.


    "The team has boarded the plane and the loading of double headed blood cattle is completed!"


    "The second team has boarded the plane, and the loading of the Oracle colossus is completed!"


    "Sanfan team has boarded the plane and the loading of Chuanshan Jialong is completed!"


    "Team four, we will arrive in your area in ten minutes. We have found that a large number of poultry variants are chasing us. Please complete the capture target as soon as possible."


    "Sifan team received it!" Gao Xing, the captain of sifan team, ordered, "throw smoke bombs and tear gas bombs!"


    Several smoke bombs and tear gas bombs were thrown into the cave of the iron tyrant. Soon, the smoke filled the air. Coupled with the effect of tear gas bombs, a huge figure roared out of the cave. It wanted to find the culprit who released the smoke!


    When the shadow appeared from the cave, mortars and sniper guns were ready. Almost at the same time, they chose to shoot.


    Bullets and bombs with virus inhibitors bombarded the huge iron tyrant more than seven meters high and blew it ten meters away.


    "Roar!" the iron tyrant roared angrily. It not only has rough skin and thick meat, but also has strong recovery ability. After being hit like this, I can still fight!


    The iron tyrant got up from the ground and was surrounded by a dozen predators!


    The iron tyrant is very angry. It roars and rushes up, and its sharp claws tear a predator to pieces in an instant!


    "Attack its thigh!" Du Xingyu remotely modified the biochemical brain of the predator''s brain and gave them new instructions.


    The predators rushed up and bit the iron tyrant''s legs.


    Even if he was seriously injured, he was besieged by secondary variants. This level 4 variant still shows strong combat effectiveness. It can smash a predator with one palm!


    With one step, you can turn them into meat mud!


    It can jump tens of meters high with one hard jump, and its muscle strength has long broken the limit of life on earth!


    "Good guy, it''s too fierce!" Gao Xing gritted his teeth and said, "continue the fire attack!"


    Gunners and snipers attacked again, and the iron tyrant received several more shots. In just a few seconds, it had killed all the predators surrounding it.


    His eyes were red. He noticed the position of the special work team and roared at them.


    "Get out!" Gao Xing hurriedly ordered him to fight with the level 4 variant in the front. Even if they have ten armored vehicles now, it''s not enough!


    Fortunately, the iron tyrant was injured and the virus inhibitors in his body were taking effect. He didn''t act so fast.


    The team members have enough time to evacuate, and the iron tyrant is still chasing hard.


    "Here it is!" Gao Xing kept observing. When the iron blood tyrant entered the target area, the mine traps they arranged also began to play a role, blowing the iron blood tyrant into flesh and blood!


    "Roar!" roared the iron tyrant. He turned around and wanted to escape!


    "This variant has some judgment!" Du Xingyu manipulated the next group of predators to harass the iron tyrant.


    The effectiveness of virus inhibitors became stronger and stronger. The iron tyrant was injured again and moved slowly. Finally, after killing a predator, the seven meter high mutant finally fell to the ground.


    "The sifan team has finished capturing the iron tyrant and asked for support!" Gao Xing immediately shouted.


    "Arrive in a minute!" the flight formation sent transport planes while fighting against the mutant birds.


    "Intensify the shelling!" Li Tai commanded the artillery team to continue bombing the insect nest center to attract the attention of senior mutants.


    The transport plane finally arrived, stayed in midair, tied the iron tyrant with a traction rope and dragged it onto the plane.


    All four captured targets were completed, and the flight formation withdrew immediately.


    This battle was obviously unexpected by the intelligent creature of the insect nest. When it sent advanced variants to hunt down, the transport plane had returned to Yunzhou base with the variants.


    "Zizi..." the whole Yunzhou insect nest sent out an infrasound wave, and even the electronic equipment in Yunzhou base was infected.


    With the transmission of the true infrasound wave, the variants of the whole Yunzhou insect nest became restless, and they began to speed up and rush to the Yunzhou base.


    "It seems that our actions have angered the wisdom of Yunzhou insect nest!" Du Xingyu speculated. "It plans to speed up its attack!"


    "This animal tide is at least three times larger than the last one, and the number of advanced variants has increased sharply." Li Tai said in a deep voice, "Professor Du, Yunzhou base, please!"


    "Hmm!" Du Xingyu immediately led the team to study the variants.


    He first used a technology simulator to scan the data of these variants, and then built a new project on the simulator to create corresponding biochemical brains to control them.


    With the experience of controlling predators, bone beetle colossus and pangolin beetle Du Xingyu soon succeeded in simulation and fitted them with appropriate biochemical brains.


    There are only two headed blood cows. Because they have two heads and need the cooperation of two biochemical brains, he spent some effort.


    Technology simulator: "double headed blood cow biochemical control simulation is successful."


    Du Xingyu immediately sent a message to the Biochemical Research Institute of the Department, "the biochemical brain and genetic information of the three head and three-level variants are here, and large-scale cloning will begin immediately!"


    "Try to ensure that biochemical weapons are transported to the front line before the impact of animal tide!"


    Transformation, control and cloning technology are the idea of mass production of biochemical weapons.


    These mutant animals grow very fast. With artificial injection of growth hormone, they can grow to maturity in just one or two months.


    Although the life span and combat effectiveness of these artificially cloned and hormone stimulated variants will be reduced, humans do not need them to live too long, which is enough!


    Du Xingyu began to study the most critical variant, the iron tyrant.


    "Roar!" in the cage made of special alloy, the iron tyrant is still roaring.


    Its height alone is more than four times that of human beings, and its muscles are incomparable. Just in front of it, people will feel a strong sense of oppression.


    "Professor, the iron tyrant''s cells are very active and can actively reject inhibitors. We must re inject it with virus inhibitors every hour, or it will run away!" the researchers reported.


    "Grade IV variants are so resistant to inhibitors that grade V variants are probably not afraid of virus inhibitors," Du Xingyu said.


    "According to our test, its IQ has reached the level of human children, can understand things and use language. It seems to respond to the infrasound wave of the insect nest that day!" the researcher continued to report.


    Du Xingyu is not surprised at this. The advanced intelligence and physical ability of the insect nest command so many mutant creatures. There must be a way of communication.


    Infrasound is one of them, but how does it make these variants willing to listen to its command?


    "There must be a secret in the mutated gene of Z virus!" Du Xingyu thought to himself.


    He began to scan the information of iron tyrants and build biochemical models in technology simulators.


    This time, the control of biochemical brain becomes more difficult. Moreover, Du Xingyu found that the iron tyrant''s gene has undergone qualitative changes with the previous three-level variants.


    Among its genes, a specially expressed gene began to appear. This gene makes its body stronger than other variants, and can store energy and accelerate energy consumption.


    In short, it is like a small biological engine installed in the body, which supports its action.


    "The level IV variant has a biological engine in its body, which makes the level IV variant stronger and more tenacious..." Du Xingyu began to decipher the genetic code of this "biological engine".


    If we can get the gene expression of this biological engine, he will have the opportunity to reproduce it into other variants, even human body!


    "Start to push back the genome information of the biological engine..." through the science and technology simulator, Du Xingyu carried out one-to-one push back simulation on the gene fragments of the iron blood tyrant to observe their biological characteristics.


    It was not until ten days later, after tens of thousands of failures, that he achieved results.


    Science and technology simulator: "the simulation of biological engine gene fragment is successful."


    "Good, now you can use it to test other experimental subjects!" Du Xingyu was very happy. If this gene fragment is inserted into the secondary and tertiary variants, it is likely that they can also think that they can be transformed into the tertiary variant!


    "According to the research on Z virus," Du Xingyu thought, "the effect of Bioengine is not only this, but the five level variant should be able to use the energy stored by Bioengine for biochemical energy conversion."


    "For example, jet flame, launch acid, high-intensity current and other biochemical weapons. No wonder the level 5 variant can destroy the aircraft carrier in North America. It must be caused by the attack of this biochemical weapon!"


    After deciphering the biological engine, it will be much easier for Du Xingyu to conquer the biochemical brain that controls the iron tyrant.


    A week later, he developed a biochemical brain that could control the iron blood tyrant, immediately sent the information back to the biochemical factory in the rear, and began to manufacture the iron blood tyrant in batches.


    During this period, more and more mutated organisms gathered in Yunzhou insect nest, and they have approached the edge of Yunzhou base.


    Different from a chaotic shock, these variants who are mutual hunters did not attack each other or rush into Yunzhou base this time.


    Instead, they hide in the periphery of Yunzhou base and form a siege. They seem to be waiting for the command of attack!


    Satellite images show that the whole Yunzhou base has been surrounded by a black tide of animals. Those terrible monsters are eyeing the human fortress city and are ready to tear them up at any time!