The Lisheng Polaris Graded Readers was created by the authors of the Oxford Reading Tree in collaboration with internationally renowned illustrators.Each book focuses on one topic, with high recurrence rates of words and sentence patterns.The stories are lively and interesting, and the topics are related to student’s life. This can help enrich students’ life experiences and improve their reading ability.The Lisheng Polaris Graded Readers has 6 levels, and each level includes 6 books. All books have audios and can be listened to by scanning a code and can also be read by an e-pen.