The Road to Success Series is a comprehensive, graded Chinese course with 22 volumes. It starts with the Threshold, followed by Lower Elementary (2 levels), Elementary (2 levels), Upper Elementary (3 Levels), Lower Intermediate (2 levels), Intermediate (2 levels), Lower Advanced (2 levels), and Advanced (2 levels). A passage of Chinese texts opens up a unit with new words and phrases and their English translations provided; then teaching points about grammar are explained explicitly, accompanied with plenty of exercises. At the end of each unit, in the section of comprehensive exercises, students can have a recap of what they have just learned in the unit by doing the exercises. This is a well-designed series of textbooks that helps learners build up their foundation of Chinese language skills and develop their skills step by step from a very beginner to a highly advanced Chinese speaker.