Scientific Research, Interpersonal Relationship and Social Influence of Lowdermilk and Fenzel in China

American soil conservationist Lowdermilk and German forester Fenzel are two representatives of the western scientists who came to China during the period of the Republic of China. Both of them had studied forestry in Germany and had visited China twice. They both taught at universities and hold concurrent posts in government departments. They proposed plans for the development of agriculture and forestry in related provinces, and also promoted personnel and science exchange between China and their own countries. They both made full use of China's geographical environment to start their own studies of forestry and soil erosion, and also had different levels of contacts with Chinese political and academic circles. This paper tries to analyze the backgrounds of their visit to China, the relationship with the political and academic communities, personality and social influence, and demonstrates the process of this group of people working in China and adapting to Chinese society.