The key to political firmness is theoretical firmness. The vast number of officers and men need to master a lot of skills to be strong in faith, politics and style. The most fundamental skill is theoretical literacy. In a certain sense, mastering the depth of the party's innovation theory determines the degree of political sensitivity, the breadth of thinking horizon and the height of ideological realm, and is related to the quality and effectiveness of strengthening the country and the military, reform and development. Scientific military theory is combat effectiveness. Future war is a military practice led by military theory innovation, and each war practice is the starting point of military theory innovation. Only by learning and making good use of advanced military theories can we better guide the practice of military struggle, comprehensively improve our ability to prepare for war in the new era, and fulfill the historical mission of the new era. Some people compare learning to digging a well. Only by drilling deep can we gain. To improve the theoretical literacy of officers and men, we should study deeply and carefully, vigorously carry forward the study style of integrating theory with practice, promote the integration of learning, thinking and application, and the unity of knowledge, belief and practice, ensure that we learn to firm our faith, learn to shoulder our mission, and strive to translate the learning results into practical actions for military training and war preparation. (outlook new era)