Is this it?

"The Soong Sister" was written by Japanese composer Kitaro. It is the theme song of the movie "The Three Song Sisters" ("Song Dynasty"). Its background is roughly: In the spring of 1981, Soong Ching Ling was seriously ill and missed her sister Soong Meiling who was far away in the United States.

Then it flashes back to the late Qing Dynasty, when the political situation was corrupt and the people were in dire straits. Charlie Song, who was educated in the United States, relied on the advanced knowledge he absorbed in the West and worked together with Sun Yat-sen to overthrow the Qing Dynasty.

Charlie Soong's three sons later served as important ministers of the Republic of China government. His three daughters studied in the United States since childhood. After completing their studies, the eldest sister Soong Ailing married Kong Xiangxi. Soong Ching-ling followed Sun Yat-sen despite her father's objections. Chiang Kai-shek fell in love with Soong Meiling and pursued her.

Under Song Ailing's instigation, the younger sister married Chiang Kai-shek.

Experienced the Revolution of 1911, Chen Jiongming's rebellion, Sun Yat-sen's death, Sun Yat-sen's death on his way north, Chiang Kai-shek's purge of the party, Japan's invasion of China, the Xi'an Incident and other historical events.

The relationship between the three sisters of the Song family is also changing in this turbulent political situation.

In the end, Soong Ching Ling could not see her sister before her death, and she died of regret.