He represented Malayan Chinese at the National Sports Carnival, Shanghai, China, during the inter-war years.

[2] Wu joined the United Nations after obtaining his doctorate and participated in the drafting of the Universal Declaration of Human Rights.

[2] Professor Wu was a founding director of the Institute of East Asian Philosophies, which was established by Goh Keng Swee in 1983 in the interest of studying Confucianism.

[3][4][5] After his retirement, Professor Wu, a modest person, lived in an HDB apartment in Jurong East, Singapore, and used taxis as his main form of transportation.

[6] He died on 17 April 1994 in Taipei, Taiwan, and a memorial service was held for him at the Presbyterian Church in Orchard Road, Singapore.