" Smart Cat ? Graded Chinese Readers" is a set of graded Chinese readers specialized in young Chinese learner (10 to 18 years old), with the entire series divided into four levels. The design is to learn the language as a whole. Under the guidance of teachers, learners take "reading" as a breakthrough point, and then expand their "listening", "speaking", "writing", "playing" and other skills. " Smart Cat " has the following six features: