Uniting old knowledge and new Tsai Yuan-pei once said of Hu Shih that Hu had "profound understanding of traditional knowledge" and also "deep comprehension of new learning." Tsai noted that Hu was able to use new methods to restructure traditional knowledge, and bring in new knowledge as well.
蔡元培曾經稱讚胡適是「舊學邃密」而且「新知深沉」的人，可以用新方法整理國故，又可以引進新知識。