As a HSK-oriented book focusing on word usage, the book is mainly suitable for Chinese language learners at the elementary and intermediate levels or learners who are going to take elementary and intermediate HSK tests. It can be used as a guidance book to facilitate students’ self-teaching any time anywhere and help them simultaneously review the content taught in the classroom. It is also an essential for TCFL teachers in preparing and giving lessons and tutoring students and a reference book for researchers in this field.