South Korean Prime Minister Lee Nak-yon delivers a keynote speech at the opening ceremony of the Boao Forum for Asia in Hainan, China on March 28, 2019. (Yonhap)

In his keynote speech at the opening ceremony of the Boao Forum for Asia in Hainan, China, the South Korean Prime Minister said the two Koreas and the United States remain on course for dialogue. He praised China, Japan and Russia's support over the North Korea issue and hoped they continue to play a meaningful role.

Mr. Lee also called for Asian countries' cooperation in tackling environmental problems, including fine dust. South Korea is grappling with heavy fine dust as the intensity and frequency of the air pollution has recently increased.