FILE - Singapore's Prime Minister Lee Hsien Loong delivers a speech during the launch of Commemorative Notes of the 50th Anniversary of the Currency Interchangeability Agreement between Singapore and Brunei at the Istana, July 5, 2017, in Singapore.
FILE - Singapore's Prime Minister Lee Hsien Loong delivers a speech during the launch of Commemorative Notes of the 50th Anniversary of the Currency Interchangeability Agreement between Singapore and Brunei at the Istana, July 5, 2017, in Singapore.

SINGAPORE - Singapore Prime Minister Lee Hsien Loong announced a cabinet reshuffle on Tuesday and named Chan Chun Sing, tipped as one of his potential successors, as trade minister.

Lee, the eldest son of Singapore's founding father Lee Kuan Yew, has made clear he is ready to stand down in the next couple of years, but no obvious successor has emerged from a group of 16 ministers tasked with picking a leader from within their ranks.

Chan is one of three potential successors picked by Singapore's media and political analysts, alongside Finance Minister Heng Swee Keat and Education Minister Ong Ye Kung, who both kept their portfolios and received additional responsibilities.

The Southeast Asian city-state has to hold a general election by early 2021.