Introduction to "Half-Nude Female Portrait": "Half-Nude Female Portrait" is Li Shutong's representative oil painting, which was created approximately between 1906 and 1909. In 2011, when the Central Academy of Fine Arts Art Museum was sorting out its collections from the Republic of China period, it discovered this "Half-Nude Female Portrait" in the warehouse. The rediscovery of this work was a major event in the history of Chinese culture and art, and had a profound impact on Li Shutong's academic research and development. The study of early Chinese oil paintings is of great significance. Li Shutong was the first art educator in China to pioneer nude sketching. The model painted in "Half-Nude Portrait" has long been considered to be Li Shutong's second wife.