She was the last surviving European eyewitness of the Chinese Communist Revolution and the beginnings of the People’s Republic of China.

After working briefly as a secretary at the Canadian embassy in Chongqing in 1944, she became a correspondent at the United Nations Picture News Office (联合国影闻宣传处) in 1945 and joined the China Welfare Fund (中国福利会).

[citation needed] One year later she took up a post at the Radio Division of the United Nations Organization in New York.

Weiss worked as a teacher at the Jewish School in Shanghai, and married Yeh Hsuan, a Chinese engineer, with whom she had two children and went to the U.S. so he could pursue studies at MIT.

[citation needed] Ruth Weiss was one of about one hundred foreign-born residents to receive Chinese citizenship in 1955.