Oei Hong Leong is the chairman of Chip Lian Investments, the Oei Hong Leong Foundation and the Nei Xue Tang Museum. Worth an estimated US$1.9 billion, the son of Chinese-Indonesian business magnate Eka Tjipta Widjaja, who co-founded Indonesian conglomerate Sinar Mas Group, made his fortune in real estate and corporate bonds.

Chip Lian has substantial investments in a number of listed Southeast Asian companies, including United Industrial Corporation, Jurong Engineering and NatSteel.

In 2017, he made a SG$6.7 billion investment to start data centre company One Belt One Net, with the money used to set up the data centres, obtain equipment, develop software, and hire and train employees with a view to positioning Singapore as an IT and investment hub. In 2020, Oei joined his younger brother, Frankle Widjaja, chairman and CEO of Bund Center Investment, to make a combined SG$1 million donation to establish two scholarships to nurture promising clinicians, faculty members, nurses and allied health professionals at SingHealth Duke-NUS Academic Medical Centre. In 2022, Oei, together with fellow Singapore businessman Sam Goi Seng Hui, invested SG$19.5 million into mm2 Asia, a media production company.

Oei owns the Nei Xue Tang Museum of Buddhist and Chinese historical art, in keeping with Oei’s status as an avid Buddhist art collector. He is married with four children.