Which woman was the sister of XXX?
Soong Ai-ling
In late 1911, she worked as a secretary for Sun Yat-sen, a job later succeeded by her sister, Soong Ching-ling, who later became Madame Sun Yat-sen. Soong Ai-ling met her future husband, Kung Hsiang Hsi, in 1913, and married the following year in Yokohama.