俞强声为美国提供的情报帮助美国政府于1985年逮捕了潜伏中央情报局40多年的中共间谍金无怠，他还披露了法国外交官伯纳德·布尔西科维中共窃取法国政府情报一事。"俞强声出走"，尽管三十年来至今一直是中美两国官方及民间的热门话题。但是，极少有知情人在此期间叙述此事。现在，《红色巨谍俞强声出走的前夜》一书的作者贺信彤女士讲述了她作为知情人的故事。
Yu Qiangsheng, whose information helped the United States arrest Larry Wu-tai Chin as CCP's spy for more than forty years in 1985, also disclosed French diplomat Bernard Boursicot's identity as a spy for CCP. Yu Qiangsheng's escape has been a hot issue in both the U.S. and China, among the official and civic communities alike. Yet his experience before the escape is rarely known to the public, which Ms. Xintong He provides her narration as an acquaintance.