Item A, the dictionary has a special dictionary and a directory of names, which contains character data of a certain discipline or multiple disciplines. It is a general comprehensive dictionary and often contains some character data. Therefore, dictionaries are also a good tool to find out the general situation of people's lives, such as China Dictionary of Names, China Dictionary of Names, China Dictionary of Historical Figures, Ancient and Modern Dictionary of Names, and China Dictionary of Modern Celebrities. In item C, the 6th edition of Cihai has added modern Chinese vocabulary, landmark projects and buildings reflecting China's new construction achievements, new professional vocabulary in various disciplines or professional fields, and famous people who died at home and abroad. Item E, Encyclopedia of China includes basic knowledge of philosophy, social science, literature and art, culture and education, natural science, engineering technology and military science.