The new swap series includes four levels. Paragraph series includes two levels. It is a follow-up advanced tutorial for the new exchange.

New communication is primary: for "real" beginners who have no English foundation.

Explain the basic grammatical structure, vocabulary and language functions.

The first episode: For learners with elementary English level, it aims to further develop grammar, grammar, vocabulary and language skills, so that learners can reach a higher elementary level.

The second episode: aimed at learners with high primary English level, it aims to further develop grammar, grammar, vocabulary and language skills, so that learners can reach intermediate level.

The third level: for intermediate level learners, cultivate learners' ability to communicate in fluent and accurate English.

CET-4/CET-5: For English learners of intermediate and advanced level, it is better to cultivate students' fluency and accuracy in English. The textbook is very good, and every episode has the right person.