The book that the publisher brings to your attention presents 214 key characters that make up the "Table of key characters," according to which the characters are systematized in Japanese and Chinese dictionaries. By analogy with ancient Chinese dictionaries, the key characters in the book are divided into six semantic groups. The practical experience of many people who are starting to learn Chinese and Japanese shows the need to memorize not only the form of the key itself, but also its serial number, which significantly speeds up the search for the desired character in the dictionary.