Children in kindergarten or grade one. According to the information of Zebra AI class, the s3 stage of Zebra Chinese is suitable for S3, suitable for children in large classes or senior one, who learn more systematically, including pinyin, literacy, ancient poems, classic stories and myths at home and abroad. Zebra AI course is a thinking and language learning course specially designed for children aged 2-8. Based on self-developed artificial intelligence (AI) technology and data-based teaching and research achievements, it is a curriculum platform for children's cognitive characteristics and behavior habits in China.