叶群
In 1937 Lin Biao was injured in an incident with the army of Yan Xishan, flew to Moscow for medical attention, and remained there until 1942. Before returning to China Lin proposed to Sun and promised to divorce his wife, from whom Lin was estranged. Sun was not able to accept Lin's proposal, but promised to consider marrying Lin after completing her studies. Lin divorced his wife after returning to China in 1942, and married another woman, Ye Qun, in 1943. The relationship between Sun and Ye was notably bad.