Most of the local wars and armed conflicts in recent years have been “hybrid” confrontations carried out in multiple dimensions and fields, emphasizing the use of military, political, economic and other means to implement systematic control in the dimension of comprehensive decision-making, creating all kinds of chaos in the dimension of international communication, and creating various chaos in the dimension of international communication. Conduct targeted strikes in the strategic focus dimension, actively shape the battlefield situation, and seek to seize the strategic initiative. In future wars, in order to successfully fight political and military battles and military and political battles, we should deeply grasp the characteristics and laws of offensive and defensive operations in the cognitive domain and improve our ability to fight the “five battles” well.
Be proactive in cognitive operations, shape the situation and control the situation, and fight proactively. Before the war begins, cognition comes first. With the continuous development and evolution of war forms, the status and role of cognitive domain operations continue to be highlighted. Aiming to win future wars, cognitive deployment should be carried out in advance. Through strategies, information, technology and other means and carriers, the physiological, psychological, values and other cognitive factors of target objects should be affected, intervened and manipulated, and cognitive attack and defense should be used to cover military operations and accurately Efficiently dominate cognitive space. Fully understand the importance of being first, grasp the definition and interpretation power of “narrative” flexibly and autonomously, emphasize pre-emption to win the initiative in the cognitive narrative struggle dimension, create a favorable situation in which legal principles are in hand and morality is on our side, and occupy the moral commanding heights.
Cognitive operations focus on attacking the heart, and implement layered strategies to fight precise battles. “Those who are good at fighting will benefit others without killing them.” In future wars, the combat space will extend to the deep sea, deep space, deep network and other fields, and the battlefield space and time will present the characteristics of being extremely far, extremely small, extremely intelligent and uninhabited, invisible, and silent. We should keep a close eye on cognitive gaps to improve effectiveness, and use methods such as big data simulation, artificial intelligence matching, and psychological model evaluation to analyze and control the key information of cognitive subjects to achieve effective penetration and early deterrence of cognitive subject information. Closely focus on cognitive blind spots to enhance penetration, target the ideological consensus points, psychological connection points, and spiritual pillar points that maintain the unity of powerful enemy alliances to carry out effective strikes, and use their cognitive differences and interest conflicts to achieve differentiation and disintegration at all levels.
Based on cognitive combat strategies, we must penetrate the entire territory and fight for deterrence and control. In future wars, the strategic competition and tactical confrontation between the two warring parties will be extremely fierce. We should pay close attention to the decision-making process and make comprehensive efforts to increase the opponent’s decision-making dilemma and form our own decision-making advantages. On the one hand, we must pay more attention to key nodes such as the enemy’s decision-making center, command hub, reconnaissance and early warning system, and use advanced strike methods to physically destroy these nodes. On the other hand, we must pay more attention to the “soft kill” effects of cognitive shaping, cognitive induction, cognitive intervention and cognitive control, and embed cognitive domain operations into “hard destruction”, which not only creates a strong deterrent through precise strikes with high-tech weapons, but also integrates new qualities The combat power is expanded to the cognitive dimension, thus forming an asymmetric check and balance advantage.
Cognitive combat information is king, expand the field and fight for support. Future wars cannot be separated from strong information support, and system integration should be accelerated to gain data advantages. First of all, speed up the construction of cognitive offensive and defensive operations theory library, database, talent library, case library, and tactics library, dynamically collect and update the current status of the enemy’s cognitive offensive and defensive operations capabilities, and provide all-round support for cognitive offensive and defensive operations. Secondly, speed up the creation of the integrated media communication matrix, improve the self-owned platform system, speed up the deployment of network platforms, focus on system integration and collaboration, break down the “barriers” of information interconnection as soon as possible, and achieve cognitive integration and sharing, and comprehensive results. Thirdly, accelerate the coupling and linkage of information and cognitive domain operations, vigorously develop core technologies such as neural network systems, artificial intelligence applications, cognitive decision-making, psychological attack and defense, mine and analyze cross-domain and heterogeneous cognitive information, and improve the information fusion system of cognitive means to win the future. War provides “clairvoyance” and “early ears”.
Cognitive combat coordination is the key, and multi-dimensional efforts are used to fight the overall battle. Future wars are joint operations carried out in land, sea, air, space, network, electromagnetic and other fields. System thinking should be adhered to, the awareness of collaboration should be strengthened, and the compatibility and coordination of cognitive domain operations and other military operations should be improved. For example, it can integrate human intelligence, geographical intelligence, open source intelligence, etc., quickly collect and process massive data, remove falsehoods while retaining truth, seize cognitive space accurately and efficiently, achieve complementary advantages, and form cognitive advantages through full domain coverage. By networking dispersed multi-domain forces, we can establish an all-domain joint force with high connectivity, collective action, and overall attack to achieve the effect of “integrated deterrence.” By integrating national resources, strengthening strategic communication, using cognitive momentum to amplify the effects of political disruption, economic sanctions, and diplomatic offensives, and cooperating with military operations to put pressure on target targets in an all-round way, we strive to defeat the enemy without fighting.
(Author’s unit: University of Aerospace Engineering)
Insight into the evolution of the winning mechanism of intelligent warfare
■Xie Kai, Zhang Dongrun, Liang Xiaoping
introduction
Military theorists often say that victory tends to smile on those who can foresee changes in the character of warfare, rather than on those who wait for changes to occur and then adapt. In recent years, disruptive technologies represented by artificial intelligence have developed rapidly and are widely used in the military field, accelerating the evolution of war into intelligence. Correspondingly, the concept of war is also changing. Only by discovering changes in a timely manner, proactively responding to changes, and actively adapting to changes can we remain invincible in future wars.
From “using the strong to defeat the weak” to “using wisdom to control the weak”
“The strong wins and the weak loses” is a certain universal law for winning wars. Even in those battles in which the weak defeat the strong, it is often necessary to form a strength advantage over the enemy locally and at a specific period of time in order to truly win. In the era of intelligent warfare, the contribution rate of intelligence superiority to combat effectiveness is much higher than other factors.
In intelligent warfare, human intelligence has widely penetrated into the combat field and been transplanted into weapon systems. All-domain, multi-dimensional, and various types of intelligent combat platforms can quickly couple combat forces, build combat systems based on mission requirements, and independently implement collaborative operations. After the mission ends, it quickly returns to the ready-to-fight state, showing a trend of intelligent autonomy. The side with higher and stronger intelligence can better develop and use the “wisdom to control” mechanism, and even design wars based on this, dominate the development of the war situation, and achieve final victory. It should also be noted that in the era of intelligent warfare, there are likely to be multiple stages of development from low to high. Try to keep yourself in an advanced stage and attack the opponent to a low-dimensional stage. This is also the mechanism of “outsmarting” by using high to defeat low. application.
From “destroying power” to “destroying cognition”
As the form of war accelerates to evolve towards intelligence, the combat space gradually expands from the physical domain and information domain to the cognitive domain, and extends from the tangible battlefield to the invisible battlefield. The cognitive space composed of human spirit and psychological activities has become a new combat space. space. Different from the main purpose of traditional war, which is to eliminate the enemy’s physical strength, intelligent warfare will pay more attention to weakening the enemy’s morale, disintegrating the enemy’s will, and destroying the enemy’s cognition.
By intelligently analyzing the opponent’s personality preferences, psychological characteristics, and decision-making habits, deterrence information can be “tailored” in a targeted manner, and the advantages of cutting-edge technologies such as intelligence can be used to demonstrate powerful strength to the opponent in a realistic way, making anxiety and suspicion Emotions such as fear and fear continued to ferment within it, eventually leading to its self-defeat. Big data, known as the “new oil”, not only enriches the source of intelligence, but also becomes an important “weapon” that affects the opponent’s cognition. By processing big data and deliberately “leaking” it to the opponent, a new “fog of war” will be created for it, making it fall into a state of cognitive confusion. In intelligent warfare, the struggle for the heart and mind will become more intense, and the party with the cognitive advantage will be better than the other party, making it easier to seize the initiative and take advantage of opportunities.
From “people-oriented” to “human-machine collaboration”
In traditional warfare, the organization and use of military force are dominated by people. With the widespread application of smart technology, the proportion of unmanned equipment continues to increase. In intelligent warfare, combat tasks will be completed by man-machine collaboration, and the two will achieve organic integration and complementary advantages. The third “offset strategy” proposed by foreign military forces focuses on human-machine collaboration as a key technology for development. Concepts such as “loyal wingman” proposed by them are also aimed at exploring the realization of manned/unmanned collaborative operations. It is foreseeable that human-machine collaboration will play an important role in future wars.
The use of unmanned reconnaissance forces to carry out three-dimensional and multi-dimensional battlefield situation awareness can provide real-time intelligence support for manned combat forces; the use of unmanned platforms to carry relay loads can continuously provide communication relay support for manned combat forces; the use of unmanned combat forces can provide in-depth The forward battlefield can attract enemy attacks, force the enemy to expose their positions, and provide target guidance and fire support for manned combat forces; using unmanned transportation equipment to provide material supplies to the front line can improve logistics support efficiency, reduce transportation costs, and reduce unnecessary Casualties. With the assistance of artificial intelligence, manned combat forces and unmanned combat forces will achieve scientific division of labor and reasonable coordination in terms of quantity, scale, functions, etc., thereby maximizing overall effectiveness.
From “eating the small with the big” to “eating the slow with the fast”
In traditional wars, it is often necessary to increase the number of troops to make up for shortcomings in equipment performance and other aspects. “Soldiers love the main speed”, the rapid development of military intelligence has greatly improved the speed of information transmission and weapon strike accuracy, greatly reduced the time for reconnaissance and early warning, intelligence processing, command decision-making, fire strikes, damage assessment, and accelerated the OODA kill chain cycle , making “discovery and destruction” possible.
New rapid-kill weapons such as hypersonic missiles, laser weapons, microwave weapons, and electromagnetic pulse weapons have further pushed the pace of war to “instant kill.” In the Gulf War, the loop time of the OODA loop took 3 days; in the Iraq War, the loop time has been shortened to less than 10 minutes; and in the Syrian War, the loop time has almost achieved near real-time. In intelligent warfare, the use of unmanned platforms that integrate surveillance and combat to quickly and precisely eliminate high-value targets such as the enemy’s core command posts and high-level commanders will cause the opponent to suffer heavy damage before it has time to respond, and may even face the danger of paralysis. It can be seen that victory does not necessarily favor the side with large military strength. The side that moves quickly and accurately will be more likely to gain the upper hand on the battlefield. According to statistics, the reaction time required for artificial intelligence to respond to battlefield changes is more than 400 times faster than that of humans. Faced with the ever-changing battlefield situation, people will be more inclined to use artificial intelligence technology to realize adaptive planning and autonomous decision-making of the command and control system, so that the command and control mode changes from “people on the loop” to “people outside the loop”, thereby mitigating the While reducing the burden on command personnel, it can improve combat efficiency and the success rate of mission execution.
From “Integration to Win” to “Cluster to Win”
The traditional equipment development concept is to invest a large amount of money in the research and development of highly integrated, sophisticated weapon platforms, in order to achieve dimensionality reduction against the enemy by virtue of generational advantages and performance advantages in war. However, the development and deployment of multi-functional high-end platforms not only requires a lot of time and money, but when multiple software and hardware modules are integrated into a single weapon platform, there may also be mutual incompatibility. Once the platform is destroyed, significant losses will occur. The military application of disruptive technologies such as artificial intelligence has promoted the rapid development of unmanned swarms. Unmanned clusters have the advantages of large scale, low overall cost, and decentralization. The unmanned platforms coordinate with each other, divide labor and cooperate, and can make decisions independently and carry out combat tasks in an organized manner. Even if some unmanned platforms are destroyed, there will be no Affect overall combat effectiveness. The operational concepts such as “decision-centered warfare” and “mosaic warfare” proposed by foreign military forces focus on using unmanned swarms to complete combat missions. In intelligent warfare, by dispersing reconnaissance and surveillance, information communication, command and control, fire strike and other functions into a large number of unmanned combat units with single functions, a highly robust and elastic “kill network” is constructed, and then based on the mission The combination method needs to be adjusted, which will allow it to emerge with powerful group intelligence, creating great uncertainty for the opponent, thereby trapping the opponent in the judgment link of the OODA loop and unable to make effective decisions. In addition, due to the large number of unmanned swarms, the opponent’s detection, tracking, and interception capabilities can quickly reach saturation. Because the opponent cannot destroy all unmanned platforms in the swarm, the opponent has to face the dilemma of defense failure.
From “military dominance” to “diversified mixture”
Traditional war mainly relies on violent means to make the enemy succumb to one’s own will. It usually has a strong war intensity and has a clear boundary between peacetime and wartime. As the field of military struggle continues to expand into new fields such as space, network, and intelligence, and the role of economic, cultural, diplomatic, legal and other means in war continues to become more prominent, intelligent warfare will be carried out in many fields represented by “grey zones” In the form of “multi-pronged approach”. The intensity of war may weaken, and the boundaries between peace and war will become more blurred. Whether it is the Saudi oil fields that were attacked by drones in 2019, which caused half of its oil production to cease, or the largest oil pipeline in the United States that suffered a cyber attack in 2021, which caused a large-scale oil shortage, the far-reaching impact of various new attack methods has been Not to be underestimated.
As intelligent technology develops and matures, it will become more common to use a variety of means to launch attacks on opponents’ industrial, transportation, financial, communications, energy, medical and other facilities and networks. The threshold for intelligent warfare will show a downward trend, and warring parties may resort to undeclared warfare to launch hybrid wars that integrate economic warfare, diplomatic warfare, cyber warfare, public opinion warfare, psychological warfare, legal warfare and other styles to tire out their opponents. To cope.
From “actual combat test” to “experimental exercise”
Under traditional conditions, due to the lack of scientific simulation and evaluation tools, the true capabilities of the military can only be tested in actual combat. Under intelligent conditions, virtual reality technology can be used to create virtual scenes with a strong three-dimensional sense and realism based on the actual battlefield environment and mission background. This scene can not only restore objective things such as weapons and equipment from multiple dimensions such as sound, appearance, and performance, but can also simulate various severe weather such as heavy fog, heavy rain, and blizzards, and visually display the terrain, meteorology, and hydrology of the battlefield. , electromagnetic, nuclear and other information, close to the real situation on the battlefield.
Setting the imaginary enemy in the virtual environment based on the characteristics of the enemy in reality and conducting intelligent simulation of the possible direction of the war situation can enable officers and soldiers to “experience” the war several times in virtual reality before the official war begins, thereby having a better understanding of the performance of the equipment. , the rhythm of war, and the situation between ourselves and the enemy are all clear, and you will be more comfortable when performing realistic tasks. Before the outbreak of the Iraq War, the US military secretly developed a computer game that simulated the combat environment in Baghdad. Among the personnel sent to perform tasks in Iraq, the survival rate of those who received game training was as high as 90%. As the data collected in reality continue to be enriched and improved, the construction of the virtual battlefield will become more realistic, the prediction of the direction of the battlefield situation will be more accurate, and the comprehensive assessment of the exercise will be more credible. Both sides of the enemy will strive to predict the situation through intelligent deduction. Knowing the outcome of the war, it may be possible to “subdue the enemy’s troops” without fighting or with a small battle.
In late April, the Institute of War Research of the Academy of Military Sciences successfully completed the submission of project demonstration proposals for two major combat issue research projects. This is a concrete practice of the institute focusing on fulfilling its core functions and always aiming at scientific research and preparation for war.
The War Research Institute is a scientific research institution specializing in the study and design of war in the entire military. As a newly established unit, the main characteristics of their scientific research work are many major tasks, many temporary tasks, and many demonstration and application tasks. At the beginning of the year, in response to the actual situation where there were few people and urgent tasks and scientific research tasks were being pushed forward, the party committee of the institute put the scientific research work aimed at strengthening the army and winning the war in an important position in accordance with the combat effectiveness standards. Based on the criteria of urgent need for war preparation, urgent need for war, and urgent need of troops, they adjusted and established key scientific research tasks in the research of war and combat issues, and the compilation of doctrines and regulations, etc., and reduced more than 10 topics that deviated from their main responsibilities and main business, and added new A batch of research on war forms, combat styles and other topics focusing on war preparation and combat were carried out. According to the leader of the institute, the party committee of the institute requires team members to both take command and go out on major scientific research tasks, so that the main energy should be devoted to key tasks, and force allocation and financial support should be tilted towards combat research.
At the same time, the institute continues to deepen the collaborative research of “small core and large periphery” and continuously innovates the scientific research organization model. They carry out “bundled” research by military theoretical personnel and military scientific and technological personnel within the institute to break down barriers to scientific research; they exchange experts with sister units such as the Military Medical Research Institute and the National Defense Engineering Research Institute to participate in major project research to achieve complementary advantages; organize scientific research Personnel participate in various major exercises and training activities to identify scientific research needs; multilateral military exchange activities are held to keep scientific researchers informed of the latest military science and technology trends. In addition, they also actively cooperate with local scientific research institutes to use local high-quality scientific research resources for their own use, forming a closed loop of researching war, designing war, operating war, and verifying war.
Since last year, the institute has completed more than 100 scientific research projects, made important breakthroughs in the development of core operational concepts and joint operational experiments, submitted more than 60 national high-end think tank research reports and important issue assessment reports, and launched a number of strategies. Innovative results that are highly innovative, original and forward-looking.
2021-06-24Source: People’s Political Consultative Conference
After the related picture of Shenzhou 12 extending its mechanical arm came out, the US media immediately carried out a new round of reports on the relevant information, and pointed out at the same time that “this may be the same as what the commander of the US space force said before. China can capture the US military. The same is true for satellites. As early as April this year, General James Dickinson, commander of the U.S. Space Force Command, publicly declared in front of media cameras that China has developed a satellite equipped with a large robotic arm, and China is trying to use this satellite for military purposes. Used to “grab and capture” US military satellites.
So, what is anti-satellite technology?
In theory, where there are satellites, there is anti-satellite technology. There are three types of artificial satellites, one is scientific satellites, the other is technology experiment satellites, and the third is application satellites. According to the purpose, it can be divided into civilian satellites and military satellites, and military satellites are divided into communication, meteorology, reconnaissance, navigation, geodetic, interception satellites, etc.
The reason for anti-satellite
In modern warfare, the sky has always maintained a huge combat advantage over the ground. The emergence of artificial satellites has extended this advantage to outer space. In future wars, whoever can control space will have the initiative in war. It has become the focus of military competition among various countries.
Artificial satellites, especially military artificial satellites, fly seven or eight kilometers per second because of their fast speed, and can circle the earth in 90 minutes; they have a wide field of vision and a wide field of vision, and the same viewing angle is tens of thousands of times that of aircraft observation; there are few restrictions and they can fly over freely Any area on the earth, while bringing great convenience to one’s own side, also brings huge potential threats to the enemy.
Therefore, since the 1960s, the world’s military powers represented by the United States and Russia have been committed to the development of anti-satellite weapons such as “anti-satellite with guides”, “anti-satellite with satellites” and “anti-satellite with energy”. Take it as an important weapon for controlling space, eliminating threats, and seizing control of the sky.
Anti-satellite technology
Anti-satellite technology refers to military technology that attacks enemy satellites from the ground, air or outer space. At present, anti-satellite technologies mainly include nuclear energy anti-satellite, direct-ascent kinetic energy anti-satellite, directed energy anti-satellite, and co-orbit anti-satellite technology. Nuclear energy anti-satellite technology has a large killing distance and low technical threshold, but because of the huge collateral damage it produces, its practical value is not great. The direct-ascent kinetic energy anti-satellite technology can be regarded as an extension of the anti-missile technology, and it is an anti-satellite method widely used by military powers with precision guidance technology.
The directed energy anti-satellite technology represented by laser weapons and the captive co-orbit anti-satellite technology are not easy to generate space debris, and can include all low-, medium-, and high-orbit satellites in the attack range, which has great potential for combat application and has been obtained. Countries all over the world are favored and competing for development. At the same time, hidden and invisible satellite soft-killing technologies such as electronic countermeasures and network attacks are also gradually showing their edge.
Anti-satellite tactics
Generally speaking, there are four types of anti-satellite tactics: co-orbit, direct ascent, directed energy, and electromagnetic interference. It is mainly realized by anti-satellite satellites and anti-satellite missiles and anti-satellite electronic jamming stations.
Co-orbital anti-satellite weapons are launched into the orbit of the target satellite, track it, and then use kinetic energy or nuclear explosion to destroy it. It has a long range of action and a large killing radius, and it can still destroy the target even when the guidance accuracy of the weapon itself is poor. But its disadvantages are low accuracy, slow response, and it takes several days from launch to destruction; in addition, the additional damage effect of nuclear bombs is large, and it is easy to pose a threat to one’s own satellite; and once used, there is a danger of triggering a nuclear war .
The direct-ascent anti-satellite missile means that the anti-satellite missile does not enter the orbit of the target satellite, but only relies on the small tracker on the missile to directly find the target satellite when the target satellite passes over the sky, and directly destroys it.
Directed energy anti-satellite refers to the use of weapons such as lasers, particle beams, and high-power microwave beams to irradiate target satellites with high-energy laser beams, particle beams, and microwave beams to completely destroy them or disable sensitive electronic components and lose their ability to work. .
Electromagnetic interference anti-satellite is the use of satellite electronic interference technology to prevent communication between satellites and ground stations, thereby achieving the purpose of invalidating satellites. This is the earliest, most common, and most basic anti-satellite tactic.
my country’s anti-satellite technology
The Soviet Union was the first country to develop satellite technology, and the United States was the first country to develop anti-satellite technology. The history of world anti-satellite technology is basically a battle between the two countries.
my country started to conduct anti-satellite tests in 2005. In the early stage, it mainly focused on testing the functions of weapons. Although it started late, it did not lag behind. Remarkable results have been achieved in anti-satellite missiles and satellites.
On January 11, 2007, my country launched an SC-19, also known as DN-1, at the Xichang Satellite Launch Center. The missile carried a kinetic energy warhead and destroyed the orbital altitude at a speed of 8 kilometers per second. The “Fengyun-1” meteorological satellite, which is 863 kilometers long and weighs 750 kilograms, has been scrapped. This is the first time that my country has successfully intercepted an artificial satellite. Since then, my country has officially entered the field of anti-satellite technology.
Afterwards, my country successively developed two new anti-satellite missiles, the second-generation DN-2 and the third-generation DN-3, and conducted two successful tests in May 2013 and July 23, 2017. The successful research and development of DN-1, DN-2 and DN-3 anti-satellite missiles have fully covered low, medium and high orbits, and artificial satellites are basically within the strike range of my country’s anti-satellite missiles. Technology has entered the world-class level.
In addition to anti-satellite missiles, my country has also developed a satellite for anti-satellite experiments. The satellite is equipped with a mechanical arm, which can change orbits and perform all-round detection of other satellites. It is convenient and flexible in application. The latest achievements in technological development.
Anti-satellite trends
In order to compete for space superiority and ensure national security, the struggle for anti-satellite weapons and satellite defense will intensify. At present, anti-satellite technology is mainly developed in the following aspects: the combination of anti-satellite and anti-missile, and the development of missile defense system to further improve the anti-satellite capability of kinetic energy weapons.
There is an inseparable relationship between ballistic missile defense systems and kinetic energy anti-satellite weapons, because weapons capable of intercepting ballistic missiles outside the atmosphere all have anti-satellite capabilities to a certain extent. The development of missile technology to promote the development of anti-satellite technology is one of the current international anti-satellite trends.
Develop micro-satellites and exert their anti-satellite capabilities. Modern micro-satellites have a short development cycle, low construction costs, low system investment, strong anti-destruction capabilities, and fast equipment updates. It can move to any position on the geosynchronous orbit, and can even perform close operations around other satellites and launch attacks. It has great potential.
At present, the military powers headed by the United States have changed from the idea of ”killer” satellites loaded with ordinary explosives and “miniature homing missiles” to new concept weapons in the development of anti-satellite weapons. Directed energy weapons have become anti-satellite weapons. Weapons are new sharp weapons, and among them, laser anti-satellite weapons are the most deterrent and most effective weapons. The development of laser anti-satellite weapons focuses on ground-based and space-based anti-satellite technologies. Combine soft and hard, and pay more attention to the use of electronic countermeasures and other soft killing methods. The innovation, development, and application of traditional electronic jamming and other soft-kill technologies, through the development of reversible non-physical anti-satellite weapons, can interfere with, deceive, or prevent target satellites from performing effective functions within a certain period of time. Countries attach great importance to and continue to develop field of.
At present, complex aerospace technologies such as autonomous approach and rendezvous and docking have been applied to anti-satellite weapons. Rendezvous and docking technology solves this problem.
(The author is a member of the National Committee of the Chinese People’s Political Consultative Conference and the chief engineer of a certain department in the northern theater)
Original Chinese Source: http://www.cppcc.gov.cn/zxww/2021/06/24/ARTI1624501659719410.shtml
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