My own things "refer to tasks within my scope, tasks that can be done, tasks that must be done, and tasks that can be completed without the intervention of others. Marxist dialectical materialism believes that the development and changes of things are determined by internal factors, which are the basis for change, external factors are the conditions for change, and external factors act through internal factors. By focusing on doing one's own things well, there are internal factors that promote the development and change of things. As big as a country or an army, as small as a person, the foothold of self-reliance and self-improvement lies in taking one's own path. "The difficulty of ambition lies not in winning others, but in winning oneself." The key is to concentrate on doing one's own things well. Since the 18th National Congress of the Communist Party of China, President Xi Jinping has repeatedly emphasized the need to focus on doing his own things well. The most important thing is to do our own things well. The key is to do our own things well. The most fundamental thing is to do our own things well; Solemnly exhort and urge people to strive forward. In the past 10 years, we have encountered risks and challenges with unprecedented complexity and severity, with high winds and sometimes even rough waves. But one important reason why we can maintain our composure, accumulate sufficient confidence, and achieve the goal of "flying through chaotic clouds calmly" and "letting the wind blow from east, west, north, and south" is that we have achieved a focus on doing our own things well. Practice has proven that focusing on doing one's own things well and placing the development of the country and nation on the basis of one's own strength is a profound grasp of the laws of historical development, a fundamental principle revealed by materialist dialectics, a profound inspiration from our party's century long struggle history, a basic conclusion proven by history and reality, and an inevitable choice to deal with the world's great changes. The army is born out of war and exists for war. For the vast number of officers and soldiers, "one's own business" is to prepare for war, which is the mission and value that cannot be changed or deviated from. It is necessary to always "concentrate" and "practice the weapons in hand, do oneself well, and strengthen oneself". If one is not attentive or devoted to their own affairs, deviates from their main responsibilities, neglects their main business, and is not aware of urgent tasks, but engages in multiple, other, or extraordinary tasks