Start both engines ■ Shen Yuzhao Innovation is the soul of a country's development and progress, as well as the soul of an army's development and progress. President Xi Jinping attaches great importance to innovation, clearly puts forward "building an innovative people's army", and repeatedly emphasizes "paying more attention to innovation drive". Military innovation is a systematic project. Theoretical innovation and technological innovation are the two engines of military innovation. Only when the two engines are driven together can they develop in a coordinated way and achieve a stable and long-term goal. To promote military innovation and build an innovative people's army, we must work hard on the integration of science and technology, so that theoretical innovation and technological innovation can form a joint force. Theory is the foundation of technology, and technology is the manifestation of theory. If military theoretical research is separated from battlefield practice, it will become water without a source and a tree without roots; Without the forward-looking design, scientific demonstration and timely guidance of military theory, military technological innovation will spin around and stop. In history, although Britain was the first to invent tank, Germany innovated and put forward the theory of "Blitzkrieg" and took the lead in applying it to large-scale operations; Gunpowder was first invented in China, but due to the influence of the backward concept of "valuing the road and light weapons", this invention could not be transformed into military power. Western countries used gunpowder to build strong ships and sharp guns, which defeated the late Qing Dynasty. At present, the new military revolution in the world is advancing by leaps and bounds, and the combination of theory and technology is getting closer and closer. Theoretical design of war, technology driven war, and technology led tactics have become the latest military trend in developed countries in the world. As early as the 1980s, Qian Xuesen proposed the combination of natural science and social science, and advocated and promoted the alliance of natural science and social science. If we cannot excel in theoretical innovation and technological innovation, it will be difficult for us to seize the first opportunity to win. To build a world-class army and win modern wars, it is urgent to break the thinking stereotype of "theory only" and "technology only" separation, strengthen the integration of theoretical and scientific and technological forces, resource integration and system integration, further explore and improve the content, mechanism and means of science and technology integration, and take a solid and good path of science and technology integration. Science and technology are the core combat effectiveness and the most active and revolutionary factor in military development. Military theory researchers should improve their cognition and understanding of scientific and technological performance, efficacy, value role and development trend, pay high attention to forward-looking, leading, exploratory and disruptive technology research, actively make advance planning and top-level design, and make strategic reserves for the preparation of future military struggle. We should innovate, research and develop strategies and tactics, keep pace with the times, strengthen the research and application of military theory, operational guidance, and operational training methods, and grasp the essentials of winning a war with what we can and cannot. With the help of technical means such as data model, calculation simulation and combat experiment, we should strive to overcome the limitations of more qualitative analysis and less quantitative analysis of military theory innovation, realize the combination of accuracy research and fuzziness research, quantitative research and qualitative research, and speed up the construction of military theory system with our military characteristics. Scientific military theory is combat effectiveness. "Without scientific theory to guide practice, it is like a ship without a rudder and compass." Military technology researchers should focus on cutting-edge interdisciplinary directions and take major scientific research projects as a platform to deeply explore the content, mechanism and means of science and technology integration. We should overcome the simple concept of technology, establish an open concept of scientific research, and adhere to the continuous innovation of military theory to guide scientific and technological innovation and weapons and equipment research and development. We should further deepen our understanding of modern war forms and winning mechanisms, adhere to the strategic basis of independent innovation, and consolidate the confidence and strength to win based on existing weapons and equipment. (author unit: 71345 Army) (outlook new era)