Dialectical materialism holds that material and spirit are highly unified and can be transformed into each other under certain conditions. On the one hand, good material conditions are an important basis for ensuring the generation of combat effectiveness; On the other hand, fighting spirit is an important aspect of combat effectiveness. President Xi Jinping clearly pointed out: "to be able to fight and win a war, the army certainly depends on strategy and tactics, systems and mechanisms, weapons and equipment, and comprehensive national strength. However, without fighting spirit, the army can not win a war if it has good combat conditions." "Less steel" was the real situation of our army; "More Qi" is our army's key to victory. In the face of life and death, from October 1934 to October 1936, our military "iron feet" ran against the enemy's "wheels" and carried out the world-famous 25000 mile long march. President Xi profoundly pointed out that "the victory of the long march depends on the heroic spirit and revolutionary spirit of the Red Army officers and men who overwhelm all enemies without being overwhelmed by any enemy, and who conquer all difficulties without being conquered by any difficulties." In the face of national peril, after 14 years of bloody struggle, the Chinese people fought hard against strong enemies, built the Great Wall with flesh and blood, and went on to national calamities, defeating the ferocious Japanese militarist invaders. President Xi made a profound statement: "the Chinese people have nurtured the great Anti Japanese spirit in the magnificent process of the Anti Japanese War, and demonstrated to the world the patriotism of the rise and fall of the world and everyone's responsibility, the national integrity of treating death like home and refusing to surrender, the heroic spirit of fearing violence and fighting to the end, and the indomitable and indomitable belief in victory." In the face of a strong enemy, on the Korean battlefield, the volunteers were in a harsh and cruel battlefield environment. They overcame "too much steel and too little gas" with "too little steel and too little gas", and wrote a magnificent epic that shocked the world and wept ghosts and gods. President Xi made a profound summary: "in this war, the fighting power of the people's army has shocked the world, and fully demonstrated the bloody iron bone that dare to fight and win!" The fact that the people's army moved from victory to victory has proved that the enemy's steel did not overwhelm the heroic people and the heroic army, but our army's Qi defeated the powerful opponent and the cruel enemy. With the broad vision of "looking at a strong military" and "looking at war" of the Marxist world outlook, President Xi deeply revealed the dialectical relationship between material conditions and fighting spirit and the contradictory characteristics of mutual transformation. It is both a scientific military epistemology and a scientific military methodology, and provides a scientific guide and fundamental guidance for realizing the party's goal of building a strong military in the new era and building a world-class army. "Material is the 'handle' of war, and spirit is the 'blade' of war." If a soldier is compared to a sharp sword, his blood spirit is a sharp blade. Only if the sword does not roll, can it cut iron like mud. Bloodiness is the fighting spirit for soldiers, and the core is the spirit of "fearing neither hardship nor death". At important military meetings, at the exercise and training sites, and during inspections of grass-roots units, President Xi stressed many times that the fighting spirit of "one is not afraid of hardship and the other is not afraid of death" must not be lost at any time. At a time when the party, the state and the people need it, the army should have this strength and spirit. Since the 18th National Congress of the Communist Party of China, through the ideological baptism of the great discussion on combat effectiveness standards, the blood and fire tempering of major training activities, and the comprehensive rectification of the style of training, performance and examination, the whole army has further strengthened its sense of being prepared for danger and waiting for danger in times of peace. The bloody tiger spirit of not fearing hardship and death has been further stimulated, and its core ability to fight and win wars has been further improved. From shenliangliang, Li Lei and yangshupeng, who used their lives to defend loyalty and peace in peacekeeping missions, to dufuguo, who shouted "you back, let me come" to his comrades in arms beside him in border demining operations, to qifabao, chenhongjun, chenxiangrong, xiaosiyuan and Wang zhuoran, who fought to the end to defend the territorial sovereignty of the motherland... Revolutionary soldiers of the new era practiced their missions with their lives, and interpreted their fearless heroism with their bold loyalty and full of blood, It has won the trust of the party, the praise of the people and the respect of the world. At the same time, it should also be noted that with the wide application of high and new technology in the battlefield, some people, influenced by the idea of "technological determinism", question the role of the fighting spirit in the future high-tech war. In fact, the status and role of the fighting spirit under the condition of informatization has not decreased, but has become increasingly prominent. Although high-tech weapons and equipment materialize the role of people in many traditional wars, the application of high-tech weapons and equipment with a wide variety, complex structures and different functions is more dependent and demanding on the role of people, and the role of people is often subject to the level of fighting spirit. To a certain extent, strengthening the fighting spirit has become the "commanding point" for both belligerents. Therefore, the important role of the fighting spirit should not be underestimated at any time. The cultivation of the fighting spirit must always be placed in an important position in army building. Of course, this is not to say that material conditions are not important. The advanced equipment of the US military, such as aircraft and tanks, has made the volunteer army pay a great sacrifice. Today, China's economic aggregate ranks second in the world, becoming the only country in the world that has all the industrial categories listed in the United Nations Industrial Classification. Our army is forming a weapons and equipment system with high-tech equipment as the backbone, providing a better material foundation for winning. With more and better steel and higher and more vigorous gas, our army will always be invincible. As President Xi Jinping emphasized during his inspection of an Army division in the central theater of operations: "our army has always been dedicated to energy. In the past, there was less steel and more gas. Now there is more steel, more gas and harder bones." Victory or defeat is a sign of spiritual foresight. Realizing the great rejuvenation of the Chinese nation is the greatest dream of the Chinese nation since modern times. In the journey from big to strong, we should be strong not only in material but also in spirit. This is an iron law of history. As far as the people's army is concerned, this kind of spirit builds up faith, strengthens fighting spirit, inspires courage and achieves victory. Only with more steel and more gas can we stand firm in the torrent of history, move forward bravely and fulfill our mission. (outlook new era)