The "Jockey Club Home-School Children's Joyful Activity Project" is a five-year pilot project aimed at developing a more effective model of sports and physical activity, through home-school cooperation and application of technology, to foster lifelong interest in sports among school children and parents and habit. This app is used with a sports wristband to provide participants with physical activity data, including steps, exercise volume, calorie burn, body mass index (BMI) and "Tongxidong" activity index and other records. It is simple and easy to understand, allowing parents You can easily understand the quality and effectiveness of your child's exercise.