Chinese Premier Li Keqiang, Cambodian Prime Minister Samdech Techo Hun Sen, Lao Prime Minister Thongloun Sisoulith, Thai Prime Minister Prayut Chan-o-cha, Vietnamese Prime Minister Nguyen Xuan Phuc and Myanmar Vice President U Myint Swe, visit an exhibition on Lancang-Mekong cooperation outcomes in Phnom Penh, Cambodia, Jan. 10, 2018. (Xinhua/Li Tao)