It enables the learners to transfer smoothly from the elementary level to the advanced level. This two-volume course book is suitable for intermediate learners with a vocabulary of 2,500 words. Aiming at developing the learners' communication skills, it provides topics in education, marriage, economy, law, etc. through functional and cultural projects. It mainly includes the 3rd level vocabulary and grammar, providing multiple repeats of key words, grammar, sentence patterns, functional items and topics. Each lesson contains text, words collocation and extension, grammar notes, sub-texts, exercises, etc. It is an excellent textbook with up- to-date content, high recurrence of words, abundant exercises and clear explanations.