With generous financial support provided by the Rockefeller Archive Center, I was able to pay a research visit to Rockefeller Archive Center from July 20 to September 7, 2018. This was my second visit to the Center, following one in 2008, when the Center granted and financially supported my one-month-long access to its archival resources. This second visit proved to be an important one. This time I took advantage of the fact that the Center now allows archive users to take photographs. As a result, I was able to proceed with my work efficiently and made extensive use of archival material which I missed in my previous visit. This report presents a description of the important historical materials I have viewed and collected during this visit. It includes seven subjects in general, described as follows, that together constitute my research project, Modern China and Rockefeller Foundation (1913-1966).