SEOUL, June 11 (Xinhua) -- South Korean President Moon Jae-in said Monday that the upcoming summit between the Democratic People's Republic of Korea (DPRK) and the United States was anticipated to be a historic milestone for peace on the Korean Peninsula.

Moon made the remarks during a weekly meeting with his senior secretaries, a day before the first-ever DPRK-U.S. summit, according to the presidential Blue House.

DPRK top leader Kim Jong Un and U.S. President Donald Trump both arrived in Singapore on Sunday for the summit, scheduled for 9:00 a.m. local time (0100GMT) Tuesday at the Capella Hotel on the Sentosa resort island.

Moon expressed his wish that the Kim-Trump summit would eliminate hostile relations and reach a great agreement for the denuclearized Korean Peninsula, praising Kim and Trump for their bold determinations.

The South Korean president asked the leaders of the DPRK and the United States to boldly exchange what they demanded with each other, saying he had his anticipation and expectations for the successful DPRK-U.S. summit.

Working-level talks between Pyongyang and Washington were reportedly underway in Singapore to fine-tune the final agreement possibly to be reached by Kim and Trump.

Trump said earlier that the upcoming summit with the DPRK leader could be a "get-to-know-you" session, indicating it would take more than one meeting to reach the eventual goal of complete denuclearization.

President Moon said the deep-rooted animosity and the denuclearization issue cannot be resolved through a one-time summit, forecasting that it could take one, or two years, and even longer to completely resolve the issues even after the Kim-Trump summit open a door.

Until the end of the complete resolution, Moon said, Seoul, Pyongyang and Washington should make sincere efforts under the continued cooperation from neighboring countries.

He emphasized the importance of improved relations between Seoul and Pyongyang and between Washington and Pyongyang ahead of the scheduled inter-Korean talks later this month.

The inter-Korean talks will focus on military affairs, sports and the reunion of Korean families separated across the heavily armed inter-Korean border since the 1950-53 Korean War ended with armistice.

The Korean Peninsula remains technically at war as the Korean War ended with armistice, not a peace treaty.