Singapore's Prime Minister Lee Hsien Loong (R) shakes hands with Indonesian President Joko Widodo during a Leaders' Retreat held in Singapore, on Sept. 7, 2017. Indonesian President Joko Widodo is in Singapore on a Leaders' Retreat with Singaporean Prime Minister Lee Hsien Loong, as Singapore and Indonesia mark 50 years of bilateral ties. (Xinhua/Then Chih Wey)
