This book is an academic series sponsored by the Modern Henan and China Research Center of Zhengzhou University, a key base of humanities and social sciences in Henan Province. Mainly publishes outstanding academic achievements in the field of modern Chinese history. This is the 9th volume. The main titles of this volume are as follows: "Study on the interactive relationship between logic and knowledge in modern China", "Eating with teeth first: the production and promotion of domestic dental appliances in modern times", "The collision of early copper-iron composites and ancient Chinese and Western metallurgical technology", "Path innovation and historical data mining: review and prospects of modern police group research", "Research on the social mobilization of the "Afforestation, Greening the Motherland" movement in the early days of the founding of New China", etc.
