National health relations. National fitness is not only the foundation of building a sports power, but also the inherent requirement of the strategy of helping healthy China. Healthy China strategy aims to improve the health level and quality of life of the whole people, and national fitness is one of the important ways to achieve this goal. By popularizing the knowledge of national fitness, providing diversified exercise options and advocating a healthy lifestyle, diseases can be effectively prevented and people's physical quality and happiness can be improved.