This book takes the modern Chinese banking industry as the research object, and deeply analyzes the inter-bank relationship in modern China and its profound influence on the operation and development of the banking industry by using the quantitative historical analysis method that has arisen in recent years. By collecting the operation and management data of all samples of modern Chinese banks, the author established the inter-bank relationship network of China in 1930s. This network not only confirms the characteristics of close inter-bank cooperation mentioned in traditional literature, but also reveals the influence of inter-bank relationship on bank management decisions and profit performance in the form of quantitative analysis for the first time. This book also provides an analytical framework for the dynamic evolution of the banking network, which provides a basis for readers to understand the changes and evolution of the bank cooperation network in modern China. This book provides a basis for readers to understand the changes and evolution of the bank cooperation network in modern China.