File photo of Singapore's PM-designate Lee Hsien Loong, wife Ho Ching and his parents.

File photo of Singapore’s PM-designate Lee Hsien Loong, wife Ho Ching and his parents.

Singapore Senior Minister Lee Kuan Yew (L), former prime minister and architect of modern Singapore, and his family celebrate his 80th birthday in Singapore in this September 16, 2003 file photo. In the photo are: his wife, Kwa Geok Choo (2nd-L), son Lee Hsien Loong (3rd-L) and daughter-in-law Ho Ching. Singapore's Prime Minister-designate Lee Hsien Loong has a very powerful, market-savvy wife - a publicity-shy, U.S. educated engineer who Fortune magazine ranks among the 25 most powerful people in Asian business. REUTERS/David Loh/Files DL/FA - RTR8GWY

June 16, 2017 10:25 AM (UTC+8)