Preschool education refers to "Senior4Pre-PrimaryEducation", which is relatively common in Hong Kong's education system. In Hong Kong, preschool education is divided into two stages: preschool education and preschool education. S4 refers to the fourth grade of preschool education, that is, the last year of preschool education. S4 Preschool education is to provide a targeted and all-round learning environment for children who are about to enter primary school. In S4 preschool education stage, educational institutions will focus on cultivating children's social skills, interest in learning, aesthetic awareness and cognitive ability, thus laying a solid foundation for their future study. Course content usually includes language development, mathematical concepts, science and inquiry, art, music, sports and other fields.