Mentioned again in show 440
From the book of knowledge:
The book tells the story of Cheng’s arrest during the first days of the Cultural Revolution, her imprisonment, release, persecution, efforts to leave China, and early life in exile.
Cheng was arrested in late 1966 after Red Guards looted her home. During her imprisonment, she was pressured to make a false confession that she was a spy for “the imperialists” because for many years after the death of her husband she had continued to work as a senior partner for Shell in Shanghai. Cheng refused to provide a false confession, and was tortured as a result.