This book is the first part of a series of two parts, and it was written by Orna Taub ,a teacher and translator of mandarin chinese. .Orna has long contacts with mandarin students to be more aware of the main difficulties of the students. . This book is unique and contains discussions which cannot be found in most of the textbooks: detailed and full explanations for vocabularies,grammatical particles,expressions (colloquial and idioms),difference between similar vocabulary (when to use this word and not that word) and more. The Chinese parts in the book are written in the Chinese simplified characters followed by pinyin ,and the explanations are all in English. The information about every grammatical particle is full and not partial as in most of the textbooks. This book is not a textbook to consistently learn Chinese,but it is a book to base and enrich the mastering in the language.