Do preschool classes refer to those training institutions that begin to attend primary school content before primary school? If so, it is still very different from early education. My son went to an early education class, Gymboree's. It is definitely not the kind of training institution to learn writing and English. It mainly focuses on enriching experience and tapping potential. Children should not give priority to cramming education before school age, and early education institutions are definitely more suitable for children than skill training and preschool classes.