This book is entirely focused in pinyin, the phonetic transcription of Chinese letters. The book is targeted to beginners in Chinese language but in case users have some knowledge, the book is a complete guide and a great method to master the pronunciation of mandarin.
The book includes a QR code and it also contains a workbook.
This manual explains the best ways to pronounce Chinese using your tongue and your vocal chords in order to achieve each sound.
Besides, it includes exercises of tone recognition of consonant and vocal letters.