Chinese Premier Li Keqiang (4th L), Laotian Prime Minister Thongloun Sisoulith (5th L) and Singaporean Prime Minister Lee Hsien Loong (4th R) cut a commemorative cake as they attend a ceremony to commemorate the 25th anniversary of the establishment of China-ASEAN dialogue relations, in Vientiane, Laos, Sept. 7, 2016. (Xinhua/Gao Jie)