[1] Born in northern Taiwan into a wealthy business family headed by his father Koo Hsien-jung,Yeh, Lindy (April 15, 2002).

[citation needed] Koo was jailed in 1946 for 19 months on treason charges for helping the Empire of Japan.Han Cheung (22 July 2018).

He remained focused on running Koos Group as well as on his political career that led to his elevation to the central committee of Kuomintang.

Despite this, Koo maintained a strong relationship with the ROC government and served as Presidential Advisor from 1991 until his death in 2005.

[5] On 16 December 1991, a little over ten months after the establishment of the SEF, the authorities of People's Republic of China (PRC) set up the Association for Relations Across the Taiwan Straits (ARATS), with Wang Daohan as its chairman.

The following year Koo and Wang held preliminary talks in Hong Kong that resulted in the so-called "1992 Consensus" and facilitated negotiations of practical matters.

On 18 October 1998, Koo met Jiang Zemin, General Secretary of the Chinese Communist Party, in Beijing, in what was then the highest-level talks yet held between the two sides.