"The Rainbow Dragon" Graded Chinese readers are especially compiled for the 3-to-11-year-old Chinese learners at home and abroad. The series encompasses 15 topics from family, food to Chinese culture and includes 225 readers classified into 3 levels of difficulty, thus forming 45 resource packages in accordance with the topics and difficulty. The series can help learners grasp 2000 common Chinese vocabulary so that they can conduct daily conversations in the language smoothly and correctly. They can be used as both textbooks and extracurricular readers.